* ext/psych/lib/psych/core_ext.rb: only extend Kernel if IRB is loaded

in order to stop method pollution.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@34914 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,3 +1,8 @@
+Tue Mar  6 02:31:20 2012  Aaron Patterson <aaron@tenderlovemaking.com>
+
+	* ext/psych/lib/psych/core_ext.rb: only extend Kernel if IRB is loaded
+	  in order to stop method pollution.
+
 Tue Mar  6 01:34:19 2012  Nobuyoshi Nakada  <nobu@ruby-lang.org>
 
 	* parse.y (block_call): rules for block_call after block_call.

ext/psych/lib/psych/core_ext.rb

@@ -30,6 +30,7 @@ class Module
   alias :yaml_as :psych_yaml_as
 end
 
+if defined?(::IRB)
 module Kernel
   def psych_y *objects
     puts Psych.dump_stream(*objects)
@@ -38,3 +39,4 @@ module Kernel
   alias y psych_y
   private :y
 end
+end