strings. To avoid the trouble, add arguments to control converting
  encoding, and do split on a UTF8 string.
* ext/tk/lib/multi-tk.rb: modify to attend encoding.
* ext/tk/lib/remote-tk.rb: ditto.
* ext/tk/lib/tk/itemconfig.rb: ditto.
* ext/tk/lib/tk/listbox.rb: ditto.
* ext/tk/lib/tk/namespace.rb: ditto.
* ext/tk/lib/tk/panedwindow.rb: ditto.
* ext/tk/lib/tk/text.rb: ditto.
* ext/tk/lib/tk/textmark.rb: ditto.
* ext/tk/lib/tk/texttag.rb: ditto.
* ext/tk/lib/tk/variable.rb: ditto.
* ext/tk/lib/tk/winfo.rb: ditto.
* ext/tk/lib/tkextlib/iwidgets/scrolledlistbox.rb: ditto.
* ext/tk/lib/tkextlib/iwidgets/scrolledtext.rb: ditto.
* ext/tk/lib/tk.rb: add TkWindow#lower_window/raise_window and
  Tk#lower_window/raise_window by reason of method-name conflict
* ext/tk/lib/tk/canvas.rb: bug fix on TkCanvas#delete when given
  non-TkcItem arguments.
* ext/tk/lib/tkextlib/iwidgets/scrolledcanvas.rb: ditto.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_8@8521 b2dd03c8-39d4-4d8f-98ff-823fe69b080e