Purpose: describe how the supertext extension is useful.

I think this is the "Supertext" that [Kitten] is talking about...

 What: text widget with undo
 Where: http://www1.clearlight.com/%7Eoakley/tcl/supertext.html 
 Description: Supertext widget with builtin undo.
 Updated: 06/1998
 Contact: mailto:oakley@vignette.com  (Bryan Oakley)
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The text widget as of 8.4a5 has an undo/redo mechanism builtin. See http://www.tcl.tk/man/tcl8.4/TkCmd/text.htm#M72 and http://www.tcl.tk/man/tcl8.4/TkCmd/text.htm#M89 for the documentation.
  See http://www.tcl.tk/cgi-bin/tct/tip/26.html for the [TIP] that implemented it.
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[Category Package]