https://git.ruby-lang.org/ruby.git/commit/?id=cea6814c2c

From cea6814c2cfae8ab8097ee90170baadc95dafcae Mon Sep 17 00:00:00 2001
From: Takashi Kokubun <takashikkbn@g...>
Date: Wed, 20 Jan 2021 01:07:29 -0800
Subject: [ruby/irb] Undefine unused constants

https://github.com/ruby/irb/commit/eea9c16804

diff --git a/test/irb/test_color_printer.rb b/test/irb/test_color_printer.rb
index b42048c..1b28837 100644
--- a/test/irb/test_color_printer.rb
+++ b/test/irb/test_color_printer.rb
@@ -8,13 +8,9 @@ module TestIRB https://github.com/ruby/ruby/blob/trunk/test/irb/test_color_printer.rb#L8
   class TestColorPrinter < Test::Unit::TestCase
     CLEAR     = "\e[0m"
     BOLD      = "\e[1m"
-    UNDERLINE = "\e[4m"
-    REVERSE   = "\e[7m"
     RED       = "\e[31m"
     GREEN     = "\e[32m"
-    YELLOW    = "\e[33m"
     BLUE      = "\e[34m"
-    MAGENTA   = "\e[35m"
     CYAN      = "\e[36m"
 
     def setup
-- 
cgit v0.10.2


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