ChangeLog: fix a miss

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@37092 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,7 +1,7 @@
 Fri Oct  5 16:04:33 2012  Narihiro Nakamura  <authornari@gmail.com>
 
-	* gc.c (chain_finalized_object): remove to check a mark flag and
-	  marking since all objects are certainly unmarked with rest_sweep.
+	* gc.c (chain_finalized_object): remove to check a mark flag since
+	  all objects are certainly unmarked with rest_sweep.
 
 	* gc.c (rb_objspace_call_finalizer): remove to mark finalizable
 	  objects. The sweeping doesn't push T_ZOMBIE objects to the