aycabta	2018-10-21 16:04:20 +0900 (Sun, 21 Oct 2018)

  New Revision: 65270

  https://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=revision&revision=65270

  Log:
    Add missing info for Mutex_m to the doc [Bug #13598]
    
    * lib/mutex_m.rb: The #initialize method in a class that includes
      Mutex_m needs calling #super.

  Modified files:
    trunk/lib/mutex_m.rb
Index: lib/mutex_m.rb
===================================================================
--- lib/mutex_m.rb	(revision 65269)
+++ lib/mutex_m.rb	(revision 65270)
@@ -25,10 +25,14 @@ https://github.com/ruby/ruby/blob/trunk/lib/mutex_m.rb#L25
 #   obj.extend Mutex_m
 #
 # Or mixin Mutex_m into your module to your class inherit Mutex instance
-# methods.
+# methods ---remember to call super() in your class initialize method.
 #
 #   class Foo
 #     include Mutex_m
+#     def initialize ...
+#       ...
+#       super()
+#     end
 #     # ...
 #   end
 #   obj = Foo.new

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