fix a typo [ci skip]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@52952 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
2015-12-08 14:03:44 +00:00 · 2015-12-08 14:03:44 +00:00 · 99c89fa56a
--- a/2
+++ b/2
@ -126,7 +126,7 @@ with all sufficient information, see the ChangeLog file.

 * String

-  * String#+@ and String#- are added to get mutable/frozen strings.
+  * String#+@ and String#-@ are added to get mutable/frozen strings.
    [Feature #11782]

 * Struct