* NEWS: news about Warning.warning. [ci skip]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@56271 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

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diff --git a/NEWS b/NEWS
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--- a/NEWS
+++ b/NEWS
@@ -117,6 +117,13 @@ with all sufficient information, see the ChangeLog file or Redmine
   * Thread#report_on_exception and Thread.report_on_exception
     [Feature #6647]
 
+* Warning
+
+  * New module named Warning is introduced.  By default it has only
+    one singleton method, also named warning.  This makes it possible
+    for 3rd-party libraries to control the way warnings are handled.
+    [Feature #12299]
+
 === Stdlib updates (outstanding ones only)
 
 * CGI