From a97a342ffc879d76c627bf55f2ba74b5992f24dc Mon Sep 17 00:00:00 2001
From: Ashwin Maroli <ashmaroli@gmail.com>
Date: Sun, 9 Sep 2018 12:36:46 +0530
Subject: [PATCH] freeze string literals in files

---
 Gemfile                                   | 2 ++
 Guardfile                                 | 2 ++
 Rakefile                                  | 2 ++
 bin/rougify                               | 1 +
 config.ru                                 | 2 ++
 lib/rouge/lexers/crystal.rb               | 1 +
 lib/rouge/lexers/gherkin/keywords.rb      | 2 ++
 lib/rouge/lexers/hcl.rb                   | 1 +
 lib/rouge/lexers/jsp.rb                   | 1 +
 lib/rouge/lexers/lua/builtins.rb          | 2 ++
 lib/rouge/lexers/m68k.rb                  | 1 +
 lib/rouge/lexers/mathematica.rb           | 1 +
 lib/rouge/lexers/mathematica/builtins.rb  | 2 ++
 lib/rouge/lexers/matlab/builtins.rb       | 2 ++
 lib/rouge/lexers/sqf.rb                   | 1 +
 lib/rouge/lexers/sqf/commands.rb          | 2 ++
 lib/rouge/lexers/terraform.rb             | 1 +
 lib/rouge/lexers/viml/keywords.rb         | 2 ++
 rouge.gemspec                             | 2 ++
 spec/cli_spec.rb                          | 1 +
 spec/formatter_spec.rb                    | 2 ++
 spec/formatters/html_linewise_spec.rb     | 1 +
 spec/formatters/html_pygments_spec.rb     | 2 ++
 spec/formatters/html_spec.rb              | 1 +
 spec/formatters/null_spec.rb              | 1 +
 spec/formatters/terminal256_spec.rb       | 1 +
 spec/guesser_spec.rb                      | 2 ++
 spec/lexer_spec.rb                        | 1 +
 spec/lexers/abap_spec.rb                  | 1 +
 spec/lexers/apache_spec.rb                | 2 ++
 spec/lexers/apiblueprint_spec.rb          | 2 ++
 spec/lexers/apple_script_spec.rb          | 1 +
 spec/lexers/awk_spec.rb                   | 1 +
 spec/lexers/biml_spec.rb                  | 1 +
 spec/lexers/bsl_spec.rb                   | 1 +
 spec/lexers/c_spec.rb                     | 1 +
 spec/lexers/ceylon_spec.rb                | 1 +
 spec/lexers/cfscript_spec.rb              | 1 +
 spec/lexers/clojure_spec.rb               | 1 +
 spec/lexers/cmake_spec.rb                 | 2 ++
 spec/lexers/coffeescript_spec.rb          | 1 +
 spec/lexers/common_lisp_spec.rb           | 1 +
 spec/lexers/conf_spec.rb                  | 1 +
 spec/lexers/coq_spec.rb                   | 1 +
 spec/lexers/cpp_spec.rb                   | 1 +
 spec/lexers/crystal_spec.rb               | 1 +
 spec/lexers/csharp_spec.rb                | 1 +
 spec/lexers/css_spec.rb                   | 1 +
 spec/lexers/d_spec.rb                     | 1 +
 spec/lexers/dart_spec.rb                  | 1 +
 spec/lexers/diff_spec.rb                  | 1 +
 spec/lexers/digdag_spec.rb                | 1 +
 spec/lexers/docker_spec.rb                | 1 +
 spec/lexers/dot_spec.rb                   | 1 +
 spec/lexers/eiffel_spec.rb                | 1 +
 spec/lexers/elixir_spec.rb                | 1 +
 spec/lexers/elm_spec.rb                   | 1 +
 spec/lexers/erb_spec.rb                   | 1 +
 spec/lexers/erlang_spec.rb                | 1 +
 spec/lexers/factor_spec.rb                | 1 +
 spec/lexers/fortran_spec.rb               | 1 +
 spec/lexers/fsharp_spec.rb                | 1 +
 spec/lexers/gherkin_spec.rb               | 1 +
 spec/lexers/go_spec.rb                    | 1 +
 spec/lexers/gradle_spec.rb                | 1 +
 spec/lexers/graphql_spec.rb               | 2 ++
 spec/lexers/groovy_spec.rb                | 1 +
 spec/lexers/hack_spec.rb                  | 1 +
 spec/lexers/haml_spec.rb                  | 1 +
 spec/lexers/handlebars_spec.rb            | 1 +
 spec/lexers/haskell_spec.rb               | 1 +
 spec/lexers/html_spec.rb                  | 1 +
 spec/lexers/hylang_spec.rb                | 1 +
 spec/lexers/idlang_spec.rb                | 1 +
 spec/lexers/igorpro_spec.rb               | 1 +
 spec/lexers/ini_spec.rb                   | 1 +
 spec/lexers/io_spec.rb                    | 1 +
 spec/lexers/java_spec.rb                  | 1 +
 spec/lexers/javascript_spec.rb            | 1 +
 spec/lexers/jinja_spec.rb                 | 1 +
 spec/lexers/jsonnet_spec.rb               | 1 +
 spec/lexers/jsp_spec.rb                   | 1 +
 spec/lexers/jsx_spec.rb                   | 2 ++
 spec/lexers/julia_spec.rb                 | 1 +
 spec/lexers/kotlin_spec.rb                | 1 +
 spec/lexers/lasso_spec.rb                 | 1 +
 spec/lexers/liquid_spec.rb                | 1 +
 spec/lexers/literate_coffeescript_spec.rb | 1 +
 spec/lexers/literate_haskell_spec.rb      | 1 +
 spec/lexers/llvm_spec.rb                  | 1 +
 spec/lexers/lua_spec.rb                   | 1 +
 spec/lexers/make_spec.rb                  | 1 +
 spec/lexers/markdown_spec.rb              | 1 +
 spec/lexers/mathematica_spec.rb           | 1 +
 spec/lexers/matlab_spec.rb                | 1 +
 spec/lexers/moonscript_spec.rb            | 1 +
 spec/lexers/mosel_spec.rb                 | 1 +
 spec/lexers/nginx_spec.rb                 | 1 +
 spec/lexers/nim_spec.rb                   | 1 +
 spec/lexers/nix_spec.rb                   | 1 +
 spec/lexers/objective_c_spec.rb           | 1 +
 spec/lexers/ocaml_spec.rb                 | 1 +
 spec/lexers/pascal_spec.rb                | 1 +
 spec/lexers/perl_spec.rb                  | 1 +
 spec/lexers/php_spec.rb                   | 1 +
 spec/lexers/plain_text_spec.rb            | 1 +
 spec/lexers/plist_spec.rb                 | 2 ++
 spec/lexers/pony_spec.rb                  | 1 +
 spec/lexers/powershell_spec.rb            | 1 +
 spec/lexers/praat_spec.rb                 | 1 +
 spec/lexers/prolog_spec.rb                | 1 +
 spec/lexers/prometheus_spec.rb            | 2 ++
 spec/lexers/properties_spec.rb            | 1 +
 spec/lexers/protobuf_spec.rb              | 1 +
 spec/lexers/puppet_spec.rb                | 1 +
 spec/lexers/python_spec.rb                | 1 +
 spec/lexers/q_spec.rb                     | 2 ++
 spec/lexers/qml_spec.rb                   | 1 +
 spec/lexers/r_spec.rb                     | 1 +
 spec/lexers/racket_spec.rb                | 1 +
 spec/lexers/ruby_spec.rb                  | 1 +
 spec/lexers/rust_spec.rb                  | 1 +
 spec/lexers/scala_spec.rb                 | 1 +
 spec/lexers/scheme_spec.rb                | 1 +
 spec/lexers/sed_spec.rb                   | 1 +
 spec/lexers/shell_spec.rb                 | 1 +
 spec/lexers/sieve_spec.rb                 | 1 +
 spec/lexers/slim_spec.rb                  | 1 +
 spec/lexers/smalltalk_spec.rb             | 1 +
 spec/lexers/smarty_spec.rb                | 1 +
 spec/lexers/sml_spec.rb                   | 1 +
 spec/lexers/sqf_spec.rb                   | 1 +
 spec/lexers/sql_spec.rb                   | 1 +
 spec/lexers/swift_spec.rb                 | 7 ++++---
 spec/lexers/tap_spec.rb                   | 2 ++
 spec/lexers/tcl_spec.rb                   | 1 +
 spec/lexers/terraform_spec.rb             | 1 +
 spec/lexers/tex_spec.rb                   | 1 +
 spec/lexers/toml_spec.rb                  | 1 +
 spec/lexers/tsx_spec.rb                   | 1 +
 spec/lexers/tulip_spec.rb                 | 2 ++
 spec/lexers/turtle_spec.rb                | 1 +
 spec/lexers/twig_spec.rb                  | 1 +
 spec/lexers/typescript_spec.rb            | 1 +
 spec/lexers/vala_spec.rb                  | 1 +
 spec/lexers/verilog_spec.rb               | 1 +
 spec/lexers/viml_spec.rb                  | 1 +
 spec/lexers/vue_spec.rb                   | 2 ++
 spec/lexers/wollok_spec.rb                | 1 +
 spec/lexers/xml_spec.rb                   | 1 +
 spec/lexers/yaml_spec.rb                  | 1 +
 spec/lexers_spec.rb                       | 3 ++-
 spec/plugins/redcarpet_spec.rb            | 1 +
 spec/spec_helper.rb                       | 1 +
 spec/support/guessing.rb                  | 1 +
 spec/support/lexing.rb                    | 1 +
 spec/theme_spec.rb                        | 1 +
 spec/token_spec.rb                        | 1 +
 spec/visual/app.rb                        | 1 +
 spec/visual_spec.rb                       | 1 +
 tasks/lex.rake                            | 2 ++
 tasks/mathematica.rake                    | 2 ++
 tasks/sqf.rake                            | 2 ++
 163 files changed, 195 insertions(+), 4 deletions(-)

diff --git a/Gemfile b/Gemfile
index bead2078da..700b0cea01 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 source 'http://rubygems.org'
 
 gemspec
diff --git a/Guardfile b/Guardfile
index 757b163a1f..ba73e0015c 100644
--- a/Guardfile
+++ b/Guardfile
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 guard :shell do
   watch(/\.rb$/) { `rake` }
 end
diff --git a/Rakefile b/Rakefile
index a1b2821487..a3411e457b 100644
--- a/Rakefile
+++ b/Rakefile
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'rake/clean'
 require 'pathname'
 require "bundler/gem_tasks"
diff --git a/bin/rougify b/bin/rougify
index a7d7df2c21..1a7cc5be7d 100755
--- a/bin/rougify
+++ b/bin/rougify
@@ -1,4 +1,5 @@
 #!/usr/bin/env ruby
+# frozen_string_literal: true
 
 require 'pathname'
 ROOT_DIR = Pathname.new(__FILE__).dirname.parent
diff --git a/config.ru b/config.ru
index 7754f04c99..4d62e7c469 100644
--- a/config.ru
+++ b/config.ru
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'pathname'
 
 here = Pathname.new(__FILE__).dirname
diff --git a/lib/rouge/lexers/crystal.rb b/lib/rouge/lexers/crystal.rb
index 4db3b6a0c3..5ef34c8a5d 100644
--- a/lib/rouge/lexers/crystal.rb
+++ b/lib/rouge/lexers/crystal.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 module Rouge
   module Lexers
diff --git a/lib/rouge/lexers/gherkin/keywords.rb b/lib/rouge/lexers/gherkin/keywords.rb
index 89d10a956d..a4168f9f18 100644
--- a/lib/rouge/lexers/gherkin/keywords.rb
+++ b/lib/rouge/lexers/gherkin/keywords.rb
@@ -1,4 +1,6 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
+
 # automatically generated by `rake builtins:gherkin`
 module Rouge
   module Lexers
diff --git a/lib/rouge/lexers/hcl.rb b/lib/rouge/lexers/hcl.rb
index c4afb06fa0..37429b1ac0 100644
--- a/lib/rouge/lexers/hcl.rb
+++ b/lib/rouge/lexers/hcl.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 module Rouge
   module Lexers
diff --git a/lib/rouge/lexers/jsp.rb b/lib/rouge/lexers/jsp.rb
index 99ea697f03..7c9f08a8e2 100644
--- a/lib/rouge/lexers/jsp.rb
+++ b/lib/rouge/lexers/jsp.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 module Rouge
   module Lexers
diff --git a/lib/rouge/lexers/lua/builtins.rb b/lib/rouge/lexers/lua/builtins.rb
index cbc38d6e3a..2704ba11da 100644
--- a/lib/rouge/lexers/lua/builtins.rb
+++ b/lib/rouge/lexers/lua/builtins.rb
@@ -1,4 +1,6 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
+
 # automatically generated by `rake builtins:lua`
 module Rouge
   module Lexers
diff --git a/lib/rouge/lexers/m68k.rb b/lib/rouge/lexers/m68k.rb
index c612a4097f..67cfa7b455 100644
--- a/lib/rouge/lexers/m68k.rb
+++ b/lib/rouge/lexers/m68k.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 module Rouge
   module Lexers
diff --git a/lib/rouge/lexers/mathematica.rb b/lib/rouge/lexers/mathematica.rb
index a430ee9a72..b4ca81791e 100644
--- a/lib/rouge/lexers/mathematica.rb
+++ b/lib/rouge/lexers/mathematica.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 module Rouge
   module Lexers
diff --git a/lib/rouge/lexers/mathematica/builtins.rb b/lib/rouge/lexers/mathematica/builtins.rb
index a53eb5d2d6..376b0d961a 100644
--- a/lib/rouge/lexers/mathematica/builtins.rb
+++ b/lib/rouge/lexers/mathematica/builtins.rb
@@ -1,4 +1,6 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
+
 # automatically generated by `rake builtins:mathematica`
 module Rouge
   module Lexers
diff --git a/lib/rouge/lexers/matlab/builtins.rb b/lib/rouge/lexers/matlab/builtins.rb
index 64be1efff8..da47116738 100644
--- a/lib/rouge/lexers/matlab/builtins.rb
+++ b/lib/rouge/lexers/matlab/builtins.rb
@@ -1,4 +1,6 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
+
 # automatically generated by `rake builtins:matlab`
 module Rouge
   module Lexers
diff --git a/lib/rouge/lexers/sqf.rb b/lib/rouge/lexers/sqf.rb
index b171d1c5d6..af58ba6032 100644
--- a/lib/rouge/lexers/sqf.rb
+++ b/lib/rouge/lexers/sqf.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 module Rouge
   module Lexers
diff --git a/lib/rouge/lexers/sqf/commands.rb b/lib/rouge/lexers/sqf/commands.rb
index c90773657f..23564faec2 100644
--- a/lib/rouge/lexers/sqf/commands.rb
+++ b/lib/rouge/lexers/sqf/commands.rb
@@ -1,4 +1,6 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
+
 # automatically generated by `rake builtins:sqf`
 module Rouge
   module Lexers
diff --git a/lib/rouge/lexers/terraform.rb b/lib/rouge/lexers/terraform.rb
index 5b7d291f90..a6aa437a97 100644
--- a/lib/rouge/lexers/terraform.rb
+++ b/lib/rouge/lexers/terraform.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 module Rouge
   module Lexers
diff --git a/lib/rouge/lexers/viml/keywords.rb b/lib/rouge/lexers/viml/keywords.rb
index f978beec19..f5a862b090 100644
--- a/lib/rouge/lexers/viml/keywords.rb
+++ b/lib/rouge/lexers/viml/keywords.rb
@@ -1,4 +1,6 @@
 # encoding: utf-8
+# frozen_string_literal: true
+
 # DO NOT EDIT: automatically generated by `rake builtins:vim`.
 # see tasks/vim.rake for more info.
 module Rouge
diff --git a/rouge.gemspec b/rouge.gemspec
index 0df36f5d3a..64f5288b5f 100644
--- a/rouge.gemspec
+++ b/rouge.gemspec
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require './lib/rouge/version'
 
 Gem::Specification.new do |s|
diff --git a/spec/cli_spec.rb b/spec/cli_spec.rb
index 6854926ce4..f6072404d4 100644
--- a/spec/cli_spec.rb
+++ b/spec/cli_spec.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 require 'rouge/cli'
 
diff --git a/spec/formatter_spec.rb b/spec/formatter_spec.rb
index c8519c77d2..92912bdd5a 100644
--- a/spec/formatter_spec.rb
+++ b/spec/formatter_spec.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 describe Rouge::Formatter do
   it 'finds terminal256' do
     assert { Rouge::Formatter.find('terminal256') }
diff --git a/spec/formatters/html_linewise_spec.rb b/spec/formatters/html_linewise_spec.rb
index e4a2ac7682..e83a9e050c 100644
--- a/spec/formatters/html_linewise_spec.rb
+++ b/spec/formatters/html_linewise_spec.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 describe Rouge::Formatters::HTMLLinewise do
   let(:subject) { Rouge::Formatters::HTMLLinewise.new(formatter, options) }
diff --git a/spec/formatters/html_pygments_spec.rb b/spec/formatters/html_pygments_spec.rb
index 5c8ab0a031..f7eca14b99 100644
--- a/spec/formatters/html_pygments_spec.rb
+++ b/spec/formatters/html_pygments_spec.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 describe Rouge::Formatters::HTMLPygments do
   let(:formatter) { Rouge::Formatters::HTML.new }
   let(:source) { 'echo "Hello World"' }
diff --git a/spec/formatters/html_spec.rb b/spec/formatters/html_spec.rb
index 0d581fbc56..462d0f909a 100644
--- a/spec/formatters/html_spec.rb
+++ b/spec/formatters/html_spec.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 describe Rouge::Formatters::HTML do
   let(:subject) { Rouge::Formatters::HTMLLegacy.new(options) }
diff --git a/spec/formatters/null_spec.rb b/spec/formatters/null_spec.rb
index 5def2250ec..444982841b 100644
--- a/spec/formatters/null_spec.rb
+++ b/spec/formatters/null_spec.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 describe Rouge::Formatters::Null do
   let(:subject) { Rouge::Formatters::Null.new }
diff --git a/spec/formatters/terminal256_spec.rb b/spec/formatters/terminal256_spec.rb
index 58da022258..e7b0bf623b 100644
--- a/spec/formatters/terminal256_spec.rb
+++ b/spec/formatters/terminal256_spec.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 describe Rouge::Formatters::Terminal256 do
   let(:subject) { Rouge::Formatters::Terminal256.new }
diff --git a/spec/guesser_spec.rb b/spec/guesser_spec.rb
index 5fed496d1a..f0e6daece3 100644
--- a/spec/guesser_spec.rb
+++ b/spec/guesser_spec.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 describe Rouge::Guesser do
   include Support::Guessing
 
diff --git a/spec/lexer_spec.rb b/spec/lexer_spec.rb
index f7220270b2..db52582128 100644
--- a/spec/lexer_spec.rb
+++ b/spec/lexer_spec.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 describe Rouge::Lexer do
   include Support::Lexing
diff --git a/spec/lexers/abap_spec.rb b/spec/lexers/abap_spec.rb
index 167a10aef8..3c3d382f89 100644
--- a/spec/lexers/abap_spec.rb
+++ b/spec/lexers/abap_spec.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 describe Rouge::Lexers::ABAP do
   let(:subject) { Rouge::Lexers::ABAP.new }
diff --git a/spec/lexers/apache_spec.rb b/spec/lexers/apache_spec.rb
index 9f5469a6be..1b763db2ff 100644
--- a/spec/lexers/apache_spec.rb
+++ b/spec/lexers/apache_spec.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 describe Rouge::Lexers::Apache do
   let(:subject) { Rouge::Lexers::Apache.new }
 
diff --git a/spec/lexers/apiblueprint_spec.rb b/spec/lexers/apiblueprint_spec.rb
index 1c926283da..8e728d42fb 100644
--- a/spec/lexers/apiblueprint_spec.rb
+++ b/spec/lexers/apiblueprint_spec.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 describe Rouge::Lexers::APIBlueprint do
   let(:subject) { Rouge::Lexers::APIBlueprint.new }
 
diff --git a/spec/lexers/apple_script_spec.rb b/spec/lexers/apple_script_spec.rb
index 9cb074710d..d430002dd5 100644
--- a/spec/lexers/apple_script_spec.rb
+++ b/spec/lexers/apple_script_spec.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 describe Rouge::Lexers::AppleScript do
   let(:subject) { Rouge::Lexers::AppleScript.new }
diff --git a/spec/lexers/awk_spec.rb b/spec/lexers/awk_spec.rb
index 22981ed856..8800160fc5 100644
--- a/spec/lexers/awk_spec.rb
+++ b/spec/lexers/awk_spec.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 describe Rouge::Lexers::Awk do
   let(:subject) { Rouge::Lexers::Awk.new }
diff --git a/spec/lexers/biml_spec.rb b/spec/lexers/biml_spec.rb
index 1de661410d..870861e906 100644
--- a/spec/lexers/biml_spec.rb
+++ b/spec/lexers/biml_spec.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 describe Rouge::Lexers::BIML do
   let(:subject) { Rouge::Lexers::BIML.new }
diff --git a/spec/lexers/bsl_spec.rb b/spec/lexers/bsl_spec.rb
index 8dfa09e3c2..45e8c61521 100644
--- a/spec/lexers/bsl_spec.rb
+++ b/spec/lexers/bsl_spec.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 describe Rouge::Lexers::Bsl do
   let(:subject) { Rouge::Lexers::Bsl.new }
diff --git a/spec/lexers/c_spec.rb b/spec/lexers/c_spec.rb
index badffc5043..c8acc301fd 100644
--- a/spec/lexers/c_spec.rb
+++ b/spec/lexers/c_spec.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 describe Rouge::Lexers::C do
   let(:subject) { Rouge::Lexers::C.new }
diff --git a/spec/lexers/ceylon_spec.rb b/spec/lexers/ceylon_spec.rb
index 5adb92801f..161cec6e20 100644
--- a/spec/lexers/ceylon_spec.rb
+++ b/spec/lexers/ceylon_spec.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 describe Rouge::Lexers::Ceylon do
   let(:subject) { Rouge::Lexers::Ceylon.new }
diff --git a/spec/lexers/cfscript_spec.rb b/spec/lexers/cfscript_spec.rb
index f7051dee8a..f9dc7ef700 100644
--- a/spec/lexers/cfscript_spec.rb
+++ b/spec/lexers/cfscript_spec.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 describe Rouge::Lexers::Cfscript do
   let(:subject) { Rouge::Lexers::Cfscript.new }
diff --git a/spec/lexers/clojure_spec.rb b/spec/lexers/clojure_spec.rb
index 3ce690c7e6..11b40d0b6d 100644
--- a/spec/lexers/clojure_spec.rb
+++ b/spec/lexers/clojure_spec.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 describe Rouge::Lexers::Clojure do
   let(:subject) { Rouge::Lexers::Clojure.new }
diff --git a/spec/lexers/cmake_spec.rb b/spec/lexers/cmake_spec.rb
index 96a5b931a4..c41b670544 100644
--- a/spec/lexers/cmake_spec.rb
+++ b/spec/lexers/cmake_spec.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 describe Rouge::Lexers::CMake do
   let(:subject) { Rouge::Lexers::CMake.new }
 
diff --git a/spec/lexers/coffeescript_spec.rb b/spec/lexers/coffeescript_spec.rb
index a28997e626..11110b4a68 100644
--- a/spec/lexers/coffeescript_spec.rb
+++ b/spec/lexers/coffeescript_spec.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 describe Rouge::Lexers::Coffeescript do
   let(:subject) { Rouge::Lexers::Coffeescript.new }
diff --git a/spec/lexers/common_lisp_spec.rb b/spec/lexers/common_lisp_spec.rb
index ee4a4780bb..4c06404363 100644
--- a/spec/lexers/common_lisp_spec.rb
+++ b/spec/lexers/common_lisp_spec.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 describe Rouge::Lexers::CommonLisp do
   let(:subject) { Rouge::Lexers::CommonLisp.new }
diff --git a/spec/lexers/conf_spec.rb b/spec/lexers/conf_spec.rb
index 0363da29ce..d2fd6d0da8 100644
--- a/spec/lexers/conf_spec.rb
+++ b/spec/lexers/conf_spec.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 describe Rouge::Lexers::Conf do
   let(:subject) { Rouge::Lexers::Conf.new }
diff --git a/spec/lexers/coq_spec.rb b/spec/lexers/coq_spec.rb
index 8da02f1d62..08fcf0a0e7 100644
--- a/spec/lexers/coq_spec.rb
+++ b/spec/lexers/coq_spec.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 describe Rouge::Lexers::Coq do
   let(:subject) { Rouge::Lexers::Coq.new }
diff --git a/spec/lexers/cpp_spec.rb b/spec/lexers/cpp_spec.rb
index 872fd335fb..97ec663a37 100644
--- a/spec/lexers/cpp_spec.rb
+++ b/spec/lexers/cpp_spec.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 describe Rouge::Lexers::Cpp do
   let(:subject) { Rouge::Lexers::Cpp.new }
diff --git a/spec/lexers/crystal_spec.rb b/spec/lexers/crystal_spec.rb
index 6c1031b62f..a95fc0e2b4 100644
--- a/spec/lexers/crystal_spec.rb
+++ b/spec/lexers/crystal_spec.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 describe Rouge::Lexers::Crystal do
   let(:subject) { Rouge::Lexers::Crystal.new }
diff --git a/spec/lexers/csharp_spec.rb b/spec/lexers/csharp_spec.rb
index d228704ecc..981c681b23 100644
--- a/spec/lexers/csharp_spec.rb
+++ b/spec/lexers/csharp_spec.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 describe Rouge::Lexers::CSharp do
   let(:subject) { Rouge::Lexers::CSharp.new }
diff --git a/spec/lexers/css_spec.rb b/spec/lexers/css_spec.rb
index 1fef32fda6..0751ecb8af 100644
--- a/spec/lexers/css_spec.rb
+++ b/spec/lexers/css_spec.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 describe Rouge::Lexers::CSS do
   let(:subject) { Rouge::Lexers::CSS.new }
diff --git a/spec/lexers/d_spec.rb b/spec/lexers/d_spec.rb
index 52116263b7..5e9de5dda4 100644
--- a/spec/lexers/d_spec.rb
+++ b/spec/lexers/d_spec.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 describe Rouge::Lexers::D do
   let(:subject) { Rouge::Lexers::D.new }
diff --git a/spec/lexers/dart_spec.rb b/spec/lexers/dart_spec.rb
index 27ff7ba317..080f0418a2 100644
--- a/spec/lexers/dart_spec.rb
+++ b/spec/lexers/dart_spec.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 describe Rouge::Lexers::Dart do
   let(:subject) { Rouge::Lexers::Dart.new }
diff --git a/spec/lexers/diff_spec.rb b/spec/lexers/diff_spec.rb
index 836e510db0..973025fa9a 100644
--- a/spec/lexers/diff_spec.rb
+++ b/spec/lexers/diff_spec.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 describe Rouge::Lexers::Diff do
   let(:subject) { Rouge::Lexers::Diff.new }
diff --git a/spec/lexers/digdag_spec.rb b/spec/lexers/digdag_spec.rb
index c26b1f310b..47b5c661e4 100644
--- a/spec/lexers/digdag_spec.rb
+++ b/spec/lexers/digdag_spec.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 describe Rouge::Lexers::Digdag do
   let(:subject) { Rouge::Lexers::Digdag.new }
diff --git a/spec/lexers/docker_spec.rb b/spec/lexers/docker_spec.rb
index 6ad925c204..8efdbce42a 100644
--- a/spec/lexers/docker_spec.rb
+++ b/spec/lexers/docker_spec.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 describe Rouge::Lexers::Docker do
   let(:subject) { Rouge::Lexers::Docker.new }
diff --git a/spec/lexers/dot_spec.rb b/spec/lexers/dot_spec.rb
index dd40b9ebaa..14a2d75dfb 100644
--- a/spec/lexers/dot_spec.rb
+++ b/spec/lexers/dot_spec.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 describe Rouge::Lexers::Dot do
   let(:subject) { Rouge::Lexers::Dot.new }
diff --git a/spec/lexers/eiffel_spec.rb b/spec/lexers/eiffel_spec.rb
index 17c9ee17b0..73860432aa 100644
--- a/spec/lexers/eiffel_spec.rb
+++ b/spec/lexers/eiffel_spec.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 describe Rouge::Lexers::Eiffel do
   let(:subject) { Rouge::Lexers::Eiffel.new }
diff --git a/spec/lexers/elixir_spec.rb b/spec/lexers/elixir_spec.rb
index a5f4b6b7eb..dbd97019e4 100644
--- a/spec/lexers/elixir_spec.rb
+++ b/spec/lexers/elixir_spec.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 describe Rouge::Lexers::Elixir do
   let(:subject) { Rouge::Lexers::Elixir.new }
diff --git a/spec/lexers/elm_spec.rb b/spec/lexers/elm_spec.rb
index c2a0f83ea3..be3c45c405 100644
--- a/spec/lexers/elm_spec.rb
+++ b/spec/lexers/elm_spec.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 describe Rouge::Lexers::Elm do
   let(:subject) { Rouge::Lexers::Elm.new }
diff --git a/spec/lexers/erb_spec.rb b/spec/lexers/erb_spec.rb
index c20dc9177f..829ec85f5c 100644
--- a/spec/lexers/erb_spec.rb
+++ b/spec/lexers/erb_spec.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 describe Rouge::Lexers::ERB do
   let(:subject) { Rouge::Lexers::ERB.new }
diff --git a/spec/lexers/erlang_spec.rb b/spec/lexers/erlang_spec.rb
index 713e32efa0..d2b6c53dfa 100644
--- a/spec/lexers/erlang_spec.rb
+++ b/spec/lexers/erlang_spec.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 describe Rouge::Lexers::Erlang do
   let(:subject) { Rouge::Lexers::Erlang.new }
diff --git a/spec/lexers/factor_spec.rb b/spec/lexers/factor_spec.rb
index 81b5e47fbf..6ef13047bd 100644
--- a/spec/lexers/factor_spec.rb
+++ b/spec/lexers/factor_spec.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 describe Rouge::Lexers::Factor do
   let(:subject) { Rouge::Lexers::Factor.new }
diff --git a/spec/lexers/fortran_spec.rb b/spec/lexers/fortran_spec.rb
index db3181b326..a7675d787a 100644
--- a/spec/lexers/fortran_spec.rb
+++ b/spec/lexers/fortran_spec.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 describe Rouge::Lexers::Fortran do
   let(:subject) { Rouge::Lexers::Fortran.new }
diff --git a/spec/lexers/fsharp_spec.rb b/spec/lexers/fsharp_spec.rb
index b6bb94f559..ccab03d4ad 100644
--- a/spec/lexers/fsharp_spec.rb
+++ b/spec/lexers/fsharp_spec.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 describe Rouge::Lexers::FSharp do
   let(:subject) { Rouge::Lexers::FSharp.new }
diff --git a/spec/lexers/gherkin_spec.rb b/spec/lexers/gherkin_spec.rb
index 4aaf0658b6..aba5d0711e 100644
--- a/spec/lexers/gherkin_spec.rb
+++ b/spec/lexers/gherkin_spec.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 describe Rouge::Lexers::Gherkin do
   let(:subject) { Rouge::Lexers::Gherkin.new }
diff --git a/spec/lexers/go_spec.rb b/spec/lexers/go_spec.rb
index 52f45b6ccd..46de641c50 100644
--- a/spec/lexers/go_spec.rb
+++ b/spec/lexers/go_spec.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 describe Rouge::Lexers::Go do
   let(:subject) { Rouge::Lexers::Go.new }
diff --git a/spec/lexers/gradle_spec.rb b/spec/lexers/gradle_spec.rb
index 29c57a2152..1f3201cec3 100644
--- a/spec/lexers/gradle_spec.rb
+++ b/spec/lexers/gradle_spec.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 describe Rouge::Lexers::Gradle do
   let(:subject) { Rouge::Lexers::Gradle.new }
diff --git a/spec/lexers/graphql_spec.rb b/spec/lexers/graphql_spec.rb
index 079f42a937..c8eba48257 100644
--- a/spec/lexers/graphql_spec.rb
+++ b/spec/lexers/graphql_spec.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 describe Rouge::Lexers::GraphQL do
   let(:subject) { Rouge::Lexers::GraphQL.new }
 
diff --git a/spec/lexers/groovy_spec.rb b/spec/lexers/groovy_spec.rb
index 6f9d155af2..21f39866a0 100644
--- a/spec/lexers/groovy_spec.rb
+++ b/spec/lexers/groovy_spec.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 describe Rouge::Lexers::Groovy do
   let(:subject) { Rouge::Lexers::Groovy.new }
diff --git a/spec/lexers/hack_spec.rb b/spec/lexers/hack_spec.rb
index 869e6400cc..9f713a80b2 100644
--- a/spec/lexers/hack_spec.rb
+++ b/spec/lexers/hack_spec.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 describe Rouge::Lexers::Hack do
   let(:subject) { Rouge::Lexers::Hack.new }
diff --git a/spec/lexers/haml_spec.rb b/spec/lexers/haml_spec.rb
index 1e8ee5367c..a162100958 100644
--- a/spec/lexers/haml_spec.rb
+++ b/spec/lexers/haml_spec.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 describe Rouge::Lexers::Haml do
   let(:subject) { Rouge::Lexers::Haml.new }
diff --git a/spec/lexers/handlebars_spec.rb b/spec/lexers/handlebars_spec.rb
index 9b3d09d083..f6fca3ed6a 100644
--- a/spec/lexers/handlebars_spec.rb
+++ b/spec/lexers/handlebars_spec.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 describe Rouge::Lexers::Handlebars do
   let(:subject) { Rouge::Lexers::Handlebars.new }
diff --git a/spec/lexers/haskell_spec.rb b/spec/lexers/haskell_spec.rb
index 9514b06051..0456618620 100644
--- a/spec/lexers/haskell_spec.rb
+++ b/spec/lexers/haskell_spec.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 describe Rouge::Lexers::Haskell do
   let(:subject) { Rouge::Lexers::Haskell.new }
diff --git a/spec/lexers/html_spec.rb b/spec/lexers/html_spec.rb
index 12f8c518ec..90fbddc4dd 100644
--- a/spec/lexers/html_spec.rb
+++ b/spec/lexers/html_spec.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 describe Rouge::Lexers::HTML do
   let(:subject) { Rouge::Lexers::HTML.new }
diff --git a/spec/lexers/hylang_spec.rb b/spec/lexers/hylang_spec.rb
index 640f9a769d..2beb27849a 100644
--- a/spec/lexers/hylang_spec.rb
+++ b/spec/lexers/hylang_spec.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 describe Rouge::Lexers::HyLang do
   let(:subject) { Rouge::Lexers::HyLang.new }
diff --git a/spec/lexers/idlang_spec.rb b/spec/lexers/idlang_spec.rb
index 6dd91a7b54..4f063da8e5 100644
--- a/spec/lexers/idlang_spec.rb
+++ b/spec/lexers/idlang_spec.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 describe Rouge::Lexers::IDLang do
   let(:subject) { Rouge::Lexers::IDLang.new }
diff --git a/spec/lexers/igorpro_spec.rb b/spec/lexers/igorpro_spec.rb
index cac8e604e6..df02872a2e 100644
--- a/spec/lexers/igorpro_spec.rb
+++ b/spec/lexers/igorpro_spec.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 describe Rouge::Lexers::IgorPro do
   let(:subject) { Rouge::Lexers::IgorPro.new }
diff --git a/spec/lexers/ini_spec.rb b/spec/lexers/ini_spec.rb
index d3415d8094..3cefe49532 100644
--- a/spec/lexers/ini_spec.rb
+++ b/spec/lexers/ini_spec.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 describe Rouge::Lexers::INI do
   let(:subject) { Rouge::Lexers::INI.new }
diff --git a/spec/lexers/io_spec.rb b/spec/lexers/io_spec.rb
index 01be4398f0..7175dba6fd 100644
--- a/spec/lexers/io_spec.rb
+++ b/spec/lexers/io_spec.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 describe Rouge::Lexers::IO do
   let(:subject) { Rouge::Lexers::IO.new }
diff --git a/spec/lexers/java_spec.rb b/spec/lexers/java_spec.rb
index 64af5d48a9..dbacdcb666 100644
--- a/spec/lexers/java_spec.rb
+++ b/spec/lexers/java_spec.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 describe Rouge::Lexers::Java do
   let(:subject) { Rouge::Lexers::Java.new }
diff --git a/spec/lexers/javascript_spec.rb b/spec/lexers/javascript_spec.rb
index 573edfcfce..ce39e9f52f 100644
--- a/spec/lexers/javascript_spec.rb
+++ b/spec/lexers/javascript_spec.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 describe Rouge::Lexers::Javascript do
   let(:subject) { Rouge::Lexers::Javascript.new }
diff --git a/spec/lexers/jinja_spec.rb b/spec/lexers/jinja_spec.rb
index 75a3a7dc70..64c6089ca4 100644
--- a/spec/lexers/jinja_spec.rb
+++ b/spec/lexers/jinja_spec.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 describe Rouge::Lexers::Jinja do
   let(:subject) { Rouge::Lexers::Jinja.new }
diff --git a/spec/lexers/jsonnet_spec.rb b/spec/lexers/jsonnet_spec.rb
index 092f9c2c44..c0409ed6ea 100644
--- a/spec/lexers/jsonnet_spec.rb
+++ b/spec/lexers/jsonnet_spec.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 describe Rouge::Lexers::Jsonnet do
   let(:subject) { Rouge::Lexers::Jsonnet.new }
diff --git a/spec/lexers/jsp_spec.rb b/spec/lexers/jsp_spec.rb
index 3894b5f975..a0ba98f04a 100644
--- a/spec/lexers/jsp_spec.rb
+++ b/spec/lexers/jsp_spec.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 describe Rouge::Lexers::JSP do
     let(:subject) { Rouge::Lexers::JSP.new }
diff --git a/spec/lexers/jsx_spec.rb b/spec/lexers/jsx_spec.rb
index ab0e56b237..fd6d583019 100644
--- a/spec/lexers/jsx_spec.rb
+++ b/spec/lexers/jsx_spec.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 describe Rouge::Lexers::JSX do
   let(:subject) { Rouge::Lexers::JSX.new }
 
diff --git a/spec/lexers/julia_spec.rb b/spec/lexers/julia_spec.rb
index 2622a0eee3..27a0288734 100644
--- a/spec/lexers/julia_spec.rb
+++ b/spec/lexers/julia_spec.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 describe Rouge::Lexers::Julia do
   let(:subject) { Rouge::Lexers::Julia.new }
diff --git a/spec/lexers/kotlin_spec.rb b/spec/lexers/kotlin_spec.rb
index 5cef1c9a36..277316f514 100644
--- a/spec/lexers/kotlin_spec.rb
+++ b/spec/lexers/kotlin_spec.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 describe Rouge::Lexers::Kotlin do
   let(:subject) { Rouge::Lexers::Kotlin.new }
diff --git a/spec/lexers/lasso_spec.rb b/spec/lexers/lasso_spec.rb
index f352901fa1..d1de6d9728 100644
--- a/spec/lexers/lasso_spec.rb
+++ b/spec/lexers/lasso_spec.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 describe Rouge::Lexers::Lasso do
   let(:subject) { Rouge::Lexers::Lasso.new }
diff --git a/spec/lexers/liquid_spec.rb b/spec/lexers/liquid_spec.rb
index 56c7a0d722..ef431642db 100644
--- a/spec/lexers/liquid_spec.rb
+++ b/spec/lexers/liquid_spec.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 describe Rouge::Lexers::Liquid do
   let(:subject) { Rouge::Lexers::Liquid.new }
diff --git a/spec/lexers/literate_coffeescript_spec.rb b/spec/lexers/literate_coffeescript_spec.rb
index d6ca3868a8..87616beb25 100644
--- a/spec/lexers/literate_coffeescript_spec.rb
+++ b/spec/lexers/literate_coffeescript_spec.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 describe Rouge::Lexers::LiterateCoffeescript do
   let(:subject) { Rouge::Lexers::LiterateCoffeescript.new }
diff --git a/spec/lexers/literate_haskell_spec.rb b/spec/lexers/literate_haskell_spec.rb
index a91a35f532..5aa20e03df 100644
--- a/spec/lexers/literate_haskell_spec.rb
+++ b/spec/lexers/literate_haskell_spec.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 describe Rouge::Lexers::LiterateHaskell do
   let(:subject) { Rouge::Lexers::LiterateHaskell.new }
diff --git a/spec/lexers/llvm_spec.rb b/spec/lexers/llvm_spec.rb
index d359d49904..c2b3c2916a 100644
--- a/spec/lexers/llvm_spec.rb
+++ b/spec/lexers/llvm_spec.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 describe Rouge::Lexers::LLVM do
   let(:subject) { Rouge::Lexers::LLVM.new }
diff --git a/spec/lexers/lua_spec.rb b/spec/lexers/lua_spec.rb
index ac84f37821..15c94e3b1b 100644
--- a/spec/lexers/lua_spec.rb
+++ b/spec/lexers/lua_spec.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 describe Rouge::Lexers::Lua do
   let(:subject) { Rouge::Lexers::Lua.new }
diff --git a/spec/lexers/make_spec.rb b/spec/lexers/make_spec.rb
index 475b6c2378..c9d26adbe7 100644
--- a/spec/lexers/make_spec.rb
+++ b/spec/lexers/make_spec.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 describe Rouge::Lexers::Make do
   let(:subject) { Rouge::Lexers::Make.new }
diff --git a/spec/lexers/markdown_spec.rb b/spec/lexers/markdown_spec.rb
index dc7c41a482..5677e9997a 100644
--- a/spec/lexers/markdown_spec.rb
+++ b/spec/lexers/markdown_spec.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 describe Rouge::Lexers::Markdown do
   let(:subject) { Rouge::Lexers::Markdown.new }
diff --git a/spec/lexers/mathematica_spec.rb b/spec/lexers/mathematica_spec.rb
index 5e1a138644..32288ec138 100644
--- a/spec/lexers/mathematica_spec.rb
+++ b/spec/lexers/mathematica_spec.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 describe Rouge::Lexers::Mathematica do
   let(:subject) { Rouge::Lexers::Mathematica.new }
diff --git a/spec/lexers/matlab_spec.rb b/spec/lexers/matlab_spec.rb
index c116213a6a..8cb573c0ee 100644
--- a/spec/lexers/matlab_spec.rb
+++ b/spec/lexers/matlab_spec.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 describe Rouge::Lexers::Matlab do
   let(:subject) { Rouge::Lexers::Matlab.new }
diff --git a/spec/lexers/moonscript_spec.rb b/spec/lexers/moonscript_spec.rb
index 131ba80fd1..59c91326fa 100644
--- a/spec/lexers/moonscript_spec.rb
+++ b/spec/lexers/moonscript_spec.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 describe Rouge::Lexers::Moonscript do
   let(:subject) { Rouge::Lexers::Moonscript.new }
diff --git a/spec/lexers/mosel_spec.rb b/spec/lexers/mosel_spec.rb
index 04d0b5c7be..fed61e9a48 100644
--- a/spec/lexers/mosel_spec.rb
+++ b/spec/lexers/mosel_spec.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 describe Rouge::Lexers::Mosel do
   let(:subject) { Rouge::Lexers::Mosel.new }
diff --git a/spec/lexers/nginx_spec.rb b/spec/lexers/nginx_spec.rb
index 937e02e32b..755a27a67a 100644
--- a/spec/lexers/nginx_spec.rb
+++ b/spec/lexers/nginx_spec.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 describe Rouge::Lexers::Nginx do
   let(:subject) { Rouge::Lexers::Nginx.new }
diff --git a/spec/lexers/nim_spec.rb b/spec/lexers/nim_spec.rb
index b478d9669c..10ed09779e 100644
--- a/spec/lexers/nim_spec.rb
+++ b/spec/lexers/nim_spec.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 describe Rouge::Lexers::Nim do
   let(:subject) { Rouge::Lexers::Nim.new }
diff --git a/spec/lexers/nix_spec.rb b/spec/lexers/nix_spec.rb
index ce5c661e5b..6cbcf52cca 100644
--- a/spec/lexers/nix_spec.rb
+++ b/spec/lexers/nix_spec.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 describe Rouge::Lexers::Nix do
   let(:subject) { Rouge::Lexers::Nix.new }
diff --git a/spec/lexers/objective_c_spec.rb b/spec/lexers/objective_c_spec.rb
index 6690c1ea59..5e56f0b207 100644
--- a/spec/lexers/objective_c_spec.rb
+++ b/spec/lexers/objective_c_spec.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 describe Rouge::Lexers::ObjectiveC do
   let(:subject) { Rouge::Lexers::ObjectiveC.new }
diff --git a/spec/lexers/ocaml_spec.rb b/spec/lexers/ocaml_spec.rb
index 212ca4f6c4..339b5f0416 100644
--- a/spec/lexers/ocaml_spec.rb
+++ b/spec/lexers/ocaml_spec.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 describe Rouge::Lexers::OCaml do
   let(:subject) { Rouge::Lexers::OCaml.new }
diff --git a/spec/lexers/pascal_spec.rb b/spec/lexers/pascal_spec.rb
index 6b4b1db02c..408d4d4c9e 100644
--- a/spec/lexers/pascal_spec.rb
+++ b/spec/lexers/pascal_spec.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 describe Rouge::Lexers::Pascal do
   let(:subject) { Rouge::Lexers::Pascal.new }
diff --git a/spec/lexers/perl_spec.rb b/spec/lexers/perl_spec.rb
index 31ee119817..395fe49903 100644
--- a/spec/lexers/perl_spec.rb
+++ b/spec/lexers/perl_spec.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 describe Rouge::Lexers::Perl do
   let(:subject) { Rouge::Lexers::Perl.new }
diff --git a/spec/lexers/php_spec.rb b/spec/lexers/php_spec.rb
index 6c874e69d5..dc7499d6b8 100644
--- a/spec/lexers/php_spec.rb
+++ b/spec/lexers/php_spec.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 describe Rouge::Lexers::PHP do
   let(:subject) { Rouge::Lexers::PHP.new }
diff --git a/spec/lexers/plain_text_spec.rb b/spec/lexers/plain_text_spec.rb
index c26dc48046..35a40da31b 100644
--- a/spec/lexers/plain_text_spec.rb
+++ b/spec/lexers/plain_text_spec.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 describe Rouge::Lexers::PlainText do
   let(:subject) { Rouge::Lexers::PlainText.new }
diff --git a/spec/lexers/plist_spec.rb b/spec/lexers/plist_spec.rb
index ccc2c7aee5..fb19151b86 100644
--- a/spec/lexers/plist_spec.rb
+++ b/spec/lexers/plist_spec.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 describe Rouge::Lexers::Plist do
   let(:subject) { Rouge::Lexers::Plist.new }
 
diff --git a/spec/lexers/pony_spec.rb b/spec/lexers/pony_spec.rb
index b29a2ef425..a736f1c482 100644
--- a/spec/lexers/pony_spec.rb
+++ b/spec/lexers/pony_spec.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 describe Rouge::Lexers::Pony do
   let(:subject) { Rouge::Lexers::Pony.new }
diff --git a/spec/lexers/powershell_spec.rb b/spec/lexers/powershell_spec.rb
index 326ce5cc46..3d96f1be12 100644
--- a/spec/lexers/powershell_spec.rb
+++ b/spec/lexers/powershell_spec.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 describe Rouge::Lexers::Powershell do
   let(:subject) { Rouge::Lexers::Powershell.new }
diff --git a/spec/lexers/praat_spec.rb b/spec/lexers/praat_spec.rb
index 6624e0fb49..1e8f6c5520 100644
--- a/spec/lexers/praat_spec.rb
+++ b/spec/lexers/praat_spec.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 describe Rouge::Lexers::Praat do
   let(:subject) { Rouge::Lexers::Praat.new }
diff --git a/spec/lexers/prolog_spec.rb b/spec/lexers/prolog_spec.rb
index ebb0501559..e3be9b7d53 100644
--- a/spec/lexers/prolog_spec.rb
+++ b/spec/lexers/prolog_spec.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 describe Rouge::Lexers::Prolog do
   let(:subject) { Rouge::Lexers::Prolog.new }
diff --git a/spec/lexers/prometheus_spec.rb b/spec/lexers/prometheus_spec.rb
index cb11a611a0..1d9aec08c4 100644
--- a/spec/lexers/prometheus_spec.rb
+++ b/spec/lexers/prometheus_spec.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 describe Rouge::Lexers::Prometheus do
   let(:subject) { Rouge::Lexers::Prometheus.new }
 
diff --git a/spec/lexers/properties_spec.rb b/spec/lexers/properties_spec.rb
index ebb64a084c..970d354e2d 100644
--- a/spec/lexers/properties_spec.rb
+++ b/spec/lexers/properties_spec.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 describe Rouge::Lexers::Properties do
   let(:subject) { Rouge::Lexers::Properties.new }
diff --git a/spec/lexers/protobuf_spec.rb b/spec/lexers/protobuf_spec.rb
index ad536fffcb..0a0722ef09 100644
--- a/spec/lexers/protobuf_spec.rb
+++ b/spec/lexers/protobuf_spec.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 describe Rouge::Lexers::Protobuf do
   let(:subject) { Rouge::Lexers::Protobuf.new }
diff --git a/spec/lexers/puppet_spec.rb b/spec/lexers/puppet_spec.rb
index a36474aa0c..884a48605a 100644
--- a/spec/lexers/puppet_spec.rb
+++ b/spec/lexers/puppet_spec.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 describe Rouge::Lexers::Puppet do
   let(:subject) { Rouge::Lexers::Puppet.new }
diff --git a/spec/lexers/python_spec.rb b/spec/lexers/python_spec.rb
index b3c22966ce..9dd0b65361 100644
--- a/spec/lexers/python_spec.rb
+++ b/spec/lexers/python_spec.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 describe Rouge::Lexers::Python do
   let(:subject) { Rouge::Lexers::Python.new }
diff --git a/spec/lexers/q_spec.rb b/spec/lexers/q_spec.rb
index 988395905a..b59d5500c9 100644
--- a/spec/lexers/q_spec.rb
+++ b/spec/lexers/q_spec.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 describe Rouge::Lexers::Q do
   let(:subject) { Rouge::Lexers::Q.new }
 
diff --git a/spec/lexers/qml_spec.rb b/spec/lexers/qml_spec.rb
index 1e7ed0cfd2..e1e5c19b76 100644
--- a/spec/lexers/qml_spec.rb
+++ b/spec/lexers/qml_spec.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 describe Rouge::Lexers::Qml do
   let(:subject) { Rouge::Lexers::Qml.new }
diff --git a/spec/lexers/r_spec.rb b/spec/lexers/r_spec.rb
index b2f716ff61..092eb94002 100644
--- a/spec/lexers/r_spec.rb
+++ b/spec/lexers/r_spec.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 describe Rouge::Lexers::R do
   let(:subject) { Rouge::Lexers::R.new }
diff --git a/spec/lexers/racket_spec.rb b/spec/lexers/racket_spec.rb
index a900417c7d..7bbb9c9c5c 100644
--- a/spec/lexers/racket_spec.rb
+++ b/spec/lexers/racket_spec.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 describe Rouge::Lexers::Racket do
   let(:subject) { Rouge::Lexers::Racket.new }
diff --git a/spec/lexers/ruby_spec.rb b/spec/lexers/ruby_spec.rb
index 806d38e497..8a051863a1 100644
--- a/spec/lexers/ruby_spec.rb
+++ b/spec/lexers/ruby_spec.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 describe Rouge::Lexers::Ruby do
   let(:subject) { Rouge::Lexers::Ruby.new }
diff --git a/spec/lexers/rust_spec.rb b/spec/lexers/rust_spec.rb
index 891599fb0c..30026e09f8 100644
--- a/spec/lexers/rust_spec.rb
+++ b/spec/lexers/rust_spec.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 describe Rouge::Lexers::Rust do
   let(:subject) { Rouge::Lexers::Rust.new }
diff --git a/spec/lexers/scala_spec.rb b/spec/lexers/scala_spec.rb
index da3f05bb27..112d0912e6 100644
--- a/spec/lexers/scala_spec.rb
+++ b/spec/lexers/scala_spec.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 describe Rouge::Lexers::Scala do
   let(:subject) { Rouge::Lexers::Scala.new }
diff --git a/spec/lexers/scheme_spec.rb b/spec/lexers/scheme_spec.rb
index be72031359..eb42081689 100644
--- a/spec/lexers/scheme_spec.rb
+++ b/spec/lexers/scheme_spec.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 describe Rouge::Lexers::Scheme do
   let(:subject) { Rouge::Lexers::Scheme.new }
diff --git a/spec/lexers/sed_spec.rb b/spec/lexers/sed_spec.rb
index 1e30932cc6..9223ffcaa7 100644
--- a/spec/lexers/sed_spec.rb
+++ b/spec/lexers/sed_spec.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 describe Rouge::Lexers::Sed do
   let(:subject) { Rouge::Lexers::Sed.new }
diff --git a/spec/lexers/shell_spec.rb b/spec/lexers/shell_spec.rb
index 1c95007aa8..1fdccd0e83 100644
--- a/spec/lexers/shell_spec.rb
+++ b/spec/lexers/shell_spec.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 describe Rouge::Lexers::Shell do
   let(:subject) { Rouge::Lexers::Shell.new }
diff --git a/spec/lexers/sieve_spec.rb b/spec/lexers/sieve_spec.rb
index 7fa969e25e..d9be367ceb 100644
--- a/spec/lexers/sieve_spec.rb
+++ b/spec/lexers/sieve_spec.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 describe Rouge::Lexers::Sieve do
   let(:subject) { Rouge::Lexers::Sieve.new }
diff --git a/spec/lexers/slim_spec.rb b/spec/lexers/slim_spec.rb
index e10aa2ad45..3750f83982 100644
--- a/spec/lexers/slim_spec.rb
+++ b/spec/lexers/slim_spec.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 describe Rouge::Lexers::Slim do
   let(:subject) { Rouge::Lexers::Slim.new }
diff --git a/spec/lexers/smalltalk_spec.rb b/spec/lexers/smalltalk_spec.rb
index 10ac2da2e4..edf8f79e02 100644
--- a/spec/lexers/smalltalk_spec.rb
+++ b/spec/lexers/smalltalk_spec.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 describe Rouge::Lexers::Smalltalk do
   let(:subject) { Rouge::Lexers::Smalltalk.new }
diff --git a/spec/lexers/smarty_spec.rb b/spec/lexers/smarty_spec.rb
index 2fff8cead1..0691bad035 100644
--- a/spec/lexers/smarty_spec.rb
+++ b/spec/lexers/smarty_spec.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 describe Rouge::Lexers::Smarty do
   let(:subject) { Rouge::Lexers::Smarty.new }
diff --git a/spec/lexers/sml_spec.rb b/spec/lexers/sml_spec.rb
index 0cfb51b2be..52416fe8e7 100644
--- a/spec/lexers/sml_spec.rb
+++ b/spec/lexers/sml_spec.rb
@@ -1,4 +1,5 @@
 # # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 # describe Rouge::Lexers::Sml do
 #   let(:subject) { Rouge::Lexers::Sml.new }
diff --git a/spec/lexers/sqf_spec.rb b/spec/lexers/sqf_spec.rb
index e3236cfbcb..15c72724f9 100644
--- a/spec/lexers/sqf_spec.rb
+++ b/spec/lexers/sqf_spec.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 describe Rouge::Lexers::SQF do
   let(:subject) { Rouge::Lexers::SQF.new }
diff --git a/spec/lexers/sql_spec.rb b/spec/lexers/sql_spec.rb
index e86a7c86e2..46021ab5dd 100644
--- a/spec/lexers/sql_spec.rb
+++ b/spec/lexers/sql_spec.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 describe Rouge::Lexers::SQL do
   let(:subject) { Rouge::Lexers::SQL.new }
diff --git a/spec/lexers/swift_spec.rb b/spec/lexers/swift_spec.rb
index 27a21727bf..1c43e4bf7b 100644
--- a/spec/lexers/swift_spec.rb
+++ b/spec/lexers/swift_spec.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 describe Rouge::Lexers::Swift do
   let(:subject) { Rouge::Lexers::Swift.new }
@@ -15,7 +16,7 @@
     include Support::Lexing
 
     it 'lexes multiline comments with asterisks and forward slashes' do
-      multiline_comment = <<EOS.strip!
+      multiline_comment = <<EOS.strip
 /*
   Multiline comment
   with asterisks (*) and forward slashes (//)
@@ -27,7 +28,7 @@
     end
 
     it 'lexes nested comments as a single comment' do
-      nested_comment = <<EOS.strip!
+      nested_comment = <<EOS.strip
 /*
   /*
     Define a and b constants
@@ -45,7 +46,7 @@
 */
 EOS
 
-      separate_comment = <<EOS.strip!
+      separate_comment = <<EOS.strip
 /*
   A separate comment
 */
diff --git a/spec/lexers/tap_spec.rb b/spec/lexers/tap_spec.rb
index 827bf39ade..7f7d423ead 100644
--- a/spec/lexers/tap_spec.rb
+++ b/spec/lexers/tap_spec.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 describe Rouge::Lexers::Tap do
   let(:subject) { Rouge::Lexers::Tap.new }
 
diff --git a/spec/lexers/tcl_spec.rb b/spec/lexers/tcl_spec.rb
index f6787707a3..124f3576b0 100644
--- a/spec/lexers/tcl_spec.rb
+++ b/spec/lexers/tcl_spec.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 describe Rouge::Lexers::TCL do
   let(:subject) { Rouge::Lexers::TCL.new }
diff --git a/spec/lexers/terraform_spec.rb b/spec/lexers/terraform_spec.rb
index 1749cef645..a5bf5ec46d 100644
--- a/spec/lexers/terraform_spec.rb
+++ b/spec/lexers/terraform_spec.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 describe Rouge::Lexers::Terraform do
   let(:subject) { Rouge::Lexers::Terraform.new }
diff --git a/spec/lexers/tex_spec.rb b/spec/lexers/tex_spec.rb
index d34084971a..23c421cbaf 100644
--- a/spec/lexers/tex_spec.rb
+++ b/spec/lexers/tex_spec.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 describe Rouge::Lexers::TeX do
   let(:subject) { Rouge::Lexers::TeX.new }
diff --git a/spec/lexers/toml_spec.rb b/spec/lexers/toml_spec.rb
index d5cdc8c79b..000c562492 100644
--- a/spec/lexers/toml_spec.rb
+++ b/spec/lexers/toml_spec.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 describe Rouge::Lexers::TOML do
   let(:subject) { Rouge::Lexers::TOML.new }
diff --git a/spec/lexers/tsx_spec.rb b/spec/lexers/tsx_spec.rb
index c3823ab4a5..8e17f567b4 100644
--- a/spec/lexers/tsx_spec.rb
+++ b/spec/lexers/tsx_spec.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 describe Rouge::Lexers::TSX do
   let(:subject) { Rouge::Lexers::TSX.new }
diff --git a/spec/lexers/tulip_spec.rb b/spec/lexers/tulip_spec.rb
index f26ceb0aaa..844cb6f4c5 100644
--- a/spec/lexers/tulip_spec.rb
+++ b/spec/lexers/tulip_spec.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 describe Rouge::Lexers::Tulip do
   let(:subject) { Rouge::Lexers::Tulip.new }
 
diff --git a/spec/lexers/turtle_spec.rb b/spec/lexers/turtle_spec.rb
index 883dfe2323..4ae2aa99c2 100644
--- a/spec/lexers/turtle_spec.rb
+++ b/spec/lexers/turtle_spec.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 describe Rouge::Lexers::Turtle do
   let(:subject) { Rouge::Lexers::Turtle.new }
diff --git a/spec/lexers/twig_spec.rb b/spec/lexers/twig_spec.rb
index 1f42b53bf4..5785d29de4 100644
--- a/spec/lexers/twig_spec.rb
+++ b/spec/lexers/twig_spec.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 describe Rouge::Lexers::Twig do
   let(:subject) { Rouge::Lexers::Twig.new }
diff --git a/spec/lexers/typescript_spec.rb b/spec/lexers/typescript_spec.rb
index e7d835ffb3..8d5defe008 100644
--- a/spec/lexers/typescript_spec.rb
+++ b/spec/lexers/typescript_spec.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 describe Rouge::Lexers::Typescript do
   let(:subject) { Rouge::Lexers::Typescript.new }
diff --git a/spec/lexers/vala_spec.rb b/spec/lexers/vala_spec.rb
index adbebad006..c885631c54 100644
--- a/spec/lexers/vala_spec.rb
+++ b/spec/lexers/vala_spec.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 describe Rouge::Lexers::Vala do
   let(:subject) { Rouge::Lexers::Vala.new }
diff --git a/spec/lexers/verilog_spec.rb b/spec/lexers/verilog_spec.rb
index 40412662c9..81dfc27de7 100644
--- a/spec/lexers/verilog_spec.rb
+++ b/spec/lexers/verilog_spec.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 describe Rouge::Lexers::Verilog do
   let(:subject) { Rouge::Lexers::Verilog.new }
diff --git a/spec/lexers/viml_spec.rb b/spec/lexers/viml_spec.rb
index e16765977d..502dcdcb53 100644
--- a/spec/lexers/viml_spec.rb
+++ b/spec/lexers/viml_spec.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 describe Rouge::Lexers::VimL do
   let(:subject) { Rouge::Lexers::VimL.new }
diff --git a/spec/lexers/vue_spec.rb b/spec/lexers/vue_spec.rb
index e65e541ada..9d2b9cd815 100644
--- a/spec/lexers/vue_spec.rb
+++ b/spec/lexers/vue_spec.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 describe Rouge::Lexers::Vue do
   let(:subject) { Rouge::Lexers::Vue.new }
 
diff --git a/spec/lexers/wollok_spec.rb b/spec/lexers/wollok_spec.rb
index 58a27d0468..e4defd7ec9 100644
--- a/spec/lexers/wollok_spec.rb
+++ b/spec/lexers/wollok_spec.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 describe Rouge::Lexers::Wollok do
   let(:subject) { Rouge::Lexers::Wollok.new }
diff --git a/spec/lexers/xml_spec.rb b/spec/lexers/xml_spec.rb
index d0337650ce..bf8e55429d 100644
--- a/spec/lexers/xml_spec.rb
+++ b/spec/lexers/xml_spec.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 describe Rouge::Lexers::XML do
   let(:subject) { Rouge::Lexers::XML.new }
diff --git a/spec/lexers/yaml_spec.rb b/spec/lexers/yaml_spec.rb
index 7cec05e7ce..10419149bd 100644
--- a/spec/lexers/yaml_spec.rb
+++ b/spec/lexers/yaml_spec.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 describe Rouge::Lexers::YAML do
   let(:subject) { Rouge::Lexers::YAML.new }
diff --git a/spec/lexers_spec.rb b/spec/lexers_spec.rb
index f5dc8f2e6e..bafda8ad5b 100644
--- a/spec/lexers_spec.rb
+++ b/spec/lexers_spec.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 describe Rouge::Lexers do
   spec_dir = Pathname.new(__FILE__).dirname
@@ -17,7 +18,7 @@
       it 'lexes the sample without throwing' do
         sample = File.read(samples_dir.join(lexer_class.tag), encoding: 'utf-8')
 
-        out_buf = ""
+        out_buf = String.new("")
         subject.lex(sample) do |token, value|
           out_buf << value
         end
diff --git a/spec/plugins/redcarpet_spec.rb b/spec/plugins/redcarpet_spec.rb
index 83a6c3b2fd..2b0e9eb690 100644
--- a/spec/plugins/redcarpet_spec.rb
+++ b/spec/plugins/redcarpet_spec.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 require 'rouge/plugins/redcarpet'
 describe Rouge::Plugins::Redcarpet do
diff --git a/spec/spec_helper.rb b/spec/spec_helper.rb
index aee0e34f16..f0d65c7f57 100644
--- a/spec/spec_helper.rb
+++ b/spec/spec_helper.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 require 'rubygems'
 require 'bundler'
diff --git a/spec/support/guessing.rb b/spec/support/guessing.rb
index 3f706f92cf..25f7253970 100644
--- a/spec/support/guessing.rb
+++ b/spec/support/guessing.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 module Support
   module Guessing
diff --git a/spec/support/lexing.rb b/spec/support/lexing.rb
index 6b1e479844..b4285881ca 100644
--- a/spec/support/lexing.rb
+++ b/spec/support/lexing.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 module Support
   module Lexing
diff --git a/spec/theme_spec.rb b/spec/theme_spec.rb
index 07e968ccdd..35bb58eb1d 100644
--- a/spec/theme_spec.rb
+++ b/spec/theme_spec.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 describe Rouge::Theme do
   def squish(str)
diff --git a/spec/token_spec.rb b/spec/token_spec.rb
index 7a4182fc8e..4ac00509b6 100644
--- a/spec/token_spec.rb
+++ b/spec/token_spec.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 describe Rouge::Token do
   it 'has a name' do
diff --git a/spec/visual/app.rb b/spec/visual/app.rb
index 9e048370a2..7a46078a30 100644
--- a/spec/visual/app.rb
+++ b/spec/visual/app.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 require 'rubygems'
 require 'bundler'
diff --git a/spec/visual_spec.rb b/spec/visual_spec.rb
index ae9aa243eb..3945947e2f 100644
--- a/spec/visual_spec.rb
+++ b/spec/visual_spec.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*- #
+# frozen_string_literal: true
 
 puts <<-msg
 
diff --git a/tasks/lex.rake b/tasks/lex.rake
index 853e34c6c9..66ce50b14c 100644
--- a/tasks/lex.rake
+++ b/tasks/lex.rake
@@ -9,6 +9,8 @@ end
 
 def lexer_template(language)
   <<-LEX
+# frozen_string_literal: true"
+
 module Rouge
   module Lexers
     class #{language.capitalize} < RegexLexer
diff --git a/tasks/mathematica.rake b/tasks/mathematica.rake
index 940a750ba0..c84340995c 100644
--- a/tasks/mathematica.rake
+++ b/tasks/mathematica.rake
@@ -19,6 +19,8 @@ end
 
 def mathematica_builtins_source
   yield   "# -*- coding: utf-8 -*- #"
+  yield   "# frozen_string_literal: true"
+  yield   ""
   yield   "# automatically generated by `rake builtins:mathematica`"
   yield   "module Rouge"
   yield   "  module Lexers"
diff --git a/tasks/sqf.rake b/tasks/sqf.rake
index 0e2f050959..ede790311d 100644
--- a/tasks/sqf.rake
+++ b/tasks/sqf.rake
@@ -3,6 +3,8 @@ require 'open-uri'
 
 def render_sqf_commands
   yield "# -*- coding: utf-8 -*- #"
+  yield "# frozen_string_literal: true"
+  yield ""
   yield "# automatically generated by `rake builtins:sqf`"
   yield "module Rouge"
   yield "  module Lexers"