https://git.ruby-lang.org/ruby.git/commit/?id=b2d2d25b94

From b2d2d25b94fd9699408759f5b8b394f54f57ef89 Mon Sep 17 00:00:00 2001
From: aycabta <aycabta@g...>
Date: Mon, 8 Feb 2021 11:08:57 +0900
Subject: [ruby/irb] Suppress colorize on Windows tests

https://github.com/ruby/irb/commit/5be9354cf9
---
 lib/irb/workspace.rb       | 2 +-
 test/irb/test_workspace.rb | 6 ++++++
 2 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/lib/irb/workspace.rb b/lib/irb/workspace.rb
index c6c328e..78d434d 100644
--- a/lib/irb/workspace.rb
+++ b/lib/irb/workspace.rb
@@ -175,7 +175,7 @@ EOF https://github.com/ruby/ruby/blob/trunk/lib/irb/workspace.rb#L175
       body = (start_pos..end_pos).map do |current_pos|
         sprintf(fmt, pos == current_pos ? '=>' : '', current_pos + 1, lines[current_pos])
       end.join("")
-      "\nFrom: #{file} @ line #{pos + 1} :\n\n#{body}#{Color.clear}\n"
+      "\nFrom: #{file} @ line #{pos + 1} :\n\n#{body}#{Color.clear if use_colorize}\n"
     end
 
     def IRB.delete_caller
diff --git a/test/irb/test_workspace.rb b/test/irb/test_workspace.rb
index 15c7731..f028fc3 100644
--- a/test/irb/test_workspace.rb
+++ b/test/irb/test_workspace.rb
@@ -9,6 +9,7 @@ require 'irb/color' https://github.com/ruby/ruby/blob/trunk/test/irb/test_workspace.rb#L9
 module TestIRB
   class TestWorkSpace < Test::Unit::TestCase
     def test_code_around_binding
+      IRB.conf[:USE_COLORIZE] = false
       Tempfile.create('irb') do |f|
         code = <<~RUBY
           # 1
@@ -33,6 +34,8 @@ module TestIRB https://github.com/ruby/ruby/blob/trunk/test/irb/test_workspace.rb#L34
 
         EOS
       end
+    ensure
+      IRB.conf.delete(:USE_COLORIZE)
     end
 
     def test_code_around_binding_with_existing_unreadable_file
@@ -52,6 +55,7 @@ module TestIRB https://github.com/ruby/ruby/blob/trunk/test/irb/test_workspace.rb#L55
     end
 
     def test_code_around_binding_with_script_lines__
+      IRB.conf[:USE_COLORIZE] = false
       with_script_lines do |script_lines|
         Tempfile.create('irb') do |f|
           code = "IRB::WorkSpace.new(binding)\n"
@@ -67,6 +71,8 @@ module TestIRB https://github.com/ruby/ruby/blob/trunk/test/irb/test_workspace.rb#L71
           EOS
         end
       end
+    ensure
+      IRB.conf.delete(:USE_COLORIZE)
     end
 
     def test_code_around_binding_on_irb
-- 
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