* for backward compatibility (see [ruby-talk:107510], [ruby-talk:107647])

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@6711 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ext/tk/lib/tk.rb

@@ -1668,6 +1668,11 @@ module Tk
   def Tk.update_idletasks
     update(true)
   end
+  def update(idle=nil)
+    # only for backward compatibility (This never be recommended to use)
+    Tk.update(idle)
+    self
+  end
 
 =begin
   #  See tcltklib.c for the reason of why the following methods are disabled.