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@@ -81,6 +81,10 @@ with all sufficient information, see the ChangeLog file or Redmine
* Hash#filter is a new alias for Hash#select [Feature #13784]
* Hash#filter! is a new alias for Hash#select! [Feature #13784]
+* IO
+
+ * new mode character 'x' to open files for exclusive access [Feature #11258]
+
* Kernel
* Kernel#then is a new alias for Kernel#yield_self [Feature #14594]