Changes to Tcl between r1 and r2

'''Tool Command Language'''

Tcl is a dynamic language...
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Tcl is a dynamic programming language that is available on many platforms.
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Some links:
   * http://www.tcl.tk/
   * http://wiki.tcl.tk/

Legend

     Only in r1
     Only in r2
     -->      Modified slightly between r1 and r2