Avoid using reset constant directly

lib/reline/io.rb

@@ -1,6 +1,8 @@
 
 module Reline
   class IO
+    RESET_COLOR = "\e[0m"
+
     def self.decide_io_gate
       if ENV['TERM'] == 'dumb'
         Reline::Dumb.new
@@ -33,6 +35,10 @@ def dumb?
     def win?
       false
     end
+
+    def reset_color_sequence
+      self.class::RESET_COLOR
+    end
   end
 end
 

lib/reline/io/ansi.rb

@@ -2,8 +2,6 @@
 require 'io/wait'
 
 class Reline::ANSI < Reline::IO
-  RESET_COLOR = "\e[0m"
-
   CAPNAME_KEY_BINDINGS = {
     'khome' => :ed_move_to_beg,
     'kend'  => :ed_move_to_end,

lib/reline/io/dumb.rb

@@ -25,10 +25,6 @@ def encoding
     end
   end
 
-  def win?
-    false
-  end
-
   def set_default_key_bindings(_)
   end
 

lib/reline/io/windows.rb

@@ -1,8 +1,6 @@
 require 'fiddle/import'
 
 class Reline::Windows < Reline::IO
-  RESET_COLOR = "\e[0m"
-
   def initialize
     @input_buf = []
     @output_buf = []

lib/reline/line_editor.rb

@@ -370,12 +370,12 @@ def render_line_differential(old_items, new_items)
         # do nothing
       elsif level == :blank
         Reline::IOGate.move_cursor_column base_x
-        @output.write "#{Reline::IOGate.class::RESET_COLOR}#{' ' * width}"
+        @output.write "#{Reline::IOGate.reset_color_sequence}#{' ' * width}"
       else
         x, w, content = new_items[level]
         content = Reline::Unicode.take_range(content, base_x - x, width) unless x == base_x && w == width
         Reline::IOGate.move_cursor_column base_x
-        @output.write "#{Reline::IOGate.class::RESET_COLOR}#{content}#{Reline::IOGate.class::RESET_COLOR}"
+        @output.write "#{Reline::IOGate.reset_color_sequence}#{content}#{Reline::IOGate.reset_color_sequence}"
       end
       base_x += width
     end

test/reline/test_line_editor.rb

@@ -4,9 +4,7 @@
 
 class Reline::LineEditor
   class RenderLineDifferentialTest < Reline::TestCase
-    class TestIO
-      RESET_COLOR = "\e[0m"
-
+    class TestIO < Reline::IO
       def move_cursor_column(col)
         @output << "[COL_#{col}]"
       end