Use semicolon instead of newline to minify

Minification aims to shorten code and reduce the number of bytes transferred.
Both "\n" and semicolons are 1 byte each, but in environments like Windows,
where "\r\n" is used for newline, a newline is 2 bytes.
Therefore, newlines are replaced with semicolons to reduce the byte count to 1 byte.

While newlines can improve the readability of backtrace in case of error,
and reducing byte count with one-liner is a trade-off,
the primary goal of minification is to reduce byte count.
Hence, reducing the byte count is prioritized.

Additionally, to comply with POSIX specification, the newline before EOF is preserved.

lib/minifyrb/minifier.rb

@@ -82,6 +82,8 @@ def minify
 
           heredoc_content_tokens.clear
           in_heredoc = false
+        when :NEWLINE
+          minified_values << (next_token.type == :EOF ? token.value : ';')
         else
           minified_values << token.value
         end

spec/minifyrb/minifier_spec.rb

@@ -75,8 +75,7 @@
 
       it 'does not contain a blank line' do
         expect(minified_ruby).to eq <<~RUBY
-          foo
-          bar
+          foo;bar
         RUBY
       end
     end
@@ -105,8 +104,7 @@
 
       it 'contain a space after method call' do
         expect(minified_ruby).to eq <<~RUBY
-          val='str'
-          foo val
+          val='str';foo val
         RUBY
       end
     end
@@ -165,8 +163,7 @@
 
       it 'contain a space after method call' do
         expect(minified_ruby).to eq <<~RUBY
-          val='str'
-          foo(val)
+          val='str';foo(val)
         RUBY
       end
     end
@@ -195,8 +192,7 @@
 
       it 'contain a space after the keyword' do
         expect(minified_ruby).to eq <<~RUBY
-          if cond
-          end
+          if cond;end
         RUBY
       end
     end
@@ -211,8 +207,7 @@
 
       it 'contain a space around the keyword' do
         expect(minified_ruby).to eq <<~RUBY
-          if cond then foo
-          end
+          if cond then foo;end
         RUBY
       end
     end
@@ -242,9 +237,7 @@
 
       it 'contain a space after the keyword' do
         expect(minified_ruby).to eq <<~RUBY
-          if cond
-          elsif cond2
-          end
+          if cond;elsif cond2;end
         RUBY
       end
     end
@@ -259,8 +252,7 @@
 
       it 'contain a space after the keyword' do
         expect(minified_ruby).to eq <<~RUBY
-          unless cond
-          end
+          unless cond;end
         RUBY
       end
     end
@@ -304,9 +296,7 @@
 
       it 'contain a space after the keyword' do
         expect(minified_ruby).to eq <<~RUBY
-          case var
-          when cond
-          end
+          case var;when cond;end
         RUBY
       end
     end
@@ -323,9 +313,7 @@
       # TODO: Remove the redundant space before `in` keyword.
       it 'contain a space after the keyword' do
         expect(minified_ruby).to eq <<~RUBY
-          case var
-           in cond
-          end
+          case var; in cond;end
         RUBY
       end
     end
@@ -340,8 +328,7 @@
 
       it 'contain a space after the keyword' do
         expect(minified_ruby).to eq <<~RUBY
-          while cond
-          end
+          while cond;end
         RUBY
       end
     end
@@ -356,8 +343,7 @@
 
       it 'contain a space after the keyword' do
         expect(minified_ruby).to eq <<~RUBY
-          until cond
-          end
+          until cond;end
         RUBY
       end
     end
@@ -400,8 +386,7 @@
 
       it 'contain a space after the keyword' do
         expect(minified_ruby).to eq <<~RUBY
-          for item in items
-          end
+          for item in items;end
         RUBY
       end
     end
@@ -599,8 +584,7 @@ def x() = foo do
 
       it 'contain a space after the keyword' do
         expect(minified_ruby).to eq <<~RUBY
-          def x()=foo do yield(x,y)
-          end
+          def x()=foo do yield(x,y);end
         RUBY
       end
     end
@@ -660,8 +644,7 @@ def x()=foo do yield(x,y)
 
       it 'contain a space after the keyword' do
         expect(minified_ruby).to eq <<~RUBY
-          begin rescue CustomError=>e
-          else ensure end
+          begin rescue CustomError=>e;else ensure end
         RUBY
       end
     end
@@ -733,9 +716,7 @@ def foo arg
 
       it 'contains spaces' do
         expect(minified_ruby).to eq <<~RUBY
-          def foo arg
-          super arg
-          end
+          def foo arg;super arg;end
         RUBY
       end
     end
@@ -750,8 +731,7 @@ def foo
 
       it 'contains spaces' do
         expect(minified_ruby).to eq <<~RUBY
-          def foo
-          end
+          def foo;end
         RUBY
       end
     end
@@ -766,8 +746,7 @@ def self.foo
 
       it 'contains spaces' do
         expect(minified_ruby).to eq <<~RUBY
-          def self.foo
-          end
+          def self.foo;end
         RUBY
       end
     end
@@ -782,8 +761,7 @@ class Foo
 
       it 'contains spaces' do
         expect(minified_ruby).to eq <<~RUBY
-          class Foo
-          end
+          class Foo;end
         RUBY
       end
     end
@@ -826,8 +804,7 @@ module Foo
 
       it 'contains spaces' do
         expect(minified_ruby).to eq <<~RUBY
-          module Foo
-          end
+          module Foo;end
         RUBY
       end
     end