Reflect the previous backport.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@1571 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

doc/NEWS

@@ -1,8 +1,3 @@
-: Readline::completion_append_characte
-: Readline::completion_append_character=
-
-  Added.
-
 : Proc#yield
 
   Added.  This is equivalent to Proc#call except it does not check the