From 35caefa5f1a6c20c1c9bc9bb92a681d7969b0f14 Mon Sep 17 00:00:00 2001
From: keiju <keiju@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Wed, 26 Dec 2012 12:29:28 +0000
Subject: 	* lib/irb/ext/math-mode.rb: make not able to change math-mode 
   after irb starting [Bug #6302]. Patched by sho-h.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@38621 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 ChangeLog                | 5 +++++
 lib/irb/ext/math-mode.rb | 2 +-
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/ChangeLog b/ChangeLog
index ba13fb5b6a..455d63c41f 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Wed Dec 26 21:09:19 2012  Keiju Ishitsuka  <keiju@ishitsuka.com>
+
+	* lib/irb/ext/math-mode.rb: make not able to change math-mode
+	  after irb starting [Bug #6302]. Patched by sho-h.
+
 Wed Dec 26 12:52:36 2012  Keiju Ishitsuka  <keiju@ishitsuka.com>
 
 	* lib/irb/init.rb: change default debug level for
diff --git a/lib/irb/ext/math-mode.rb b/lib/irb/ext/math-mode.rb
index 4f3c5c18ba..067eb1e7fa 100644
--- a/lib/irb/ext/math-mode.rb
+++ b/lib/irb/ext/math-mode.rb
@@ -27,7 +27,7 @@ module IRB
     # See IRB@Command+line+options and the unix manpage <code>bc(1)</code> for
     # more information.
     def math_mode=(opt)
-      if @math_mode == true && opt == false
+      if @math_mode == true && !opt
 	IRB.fail CantReturnToNormalMode
 	return
       end
-- 
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