Log Message:
Update to tkdiff-4.1.3. Closes PR pkg/34440

4.1.3
 * Fixed incompatibility with older versions of Tcl/Tk ("-state disabled").
 * Applied Warren Jones' subversion patch, which prevents the svn error that
   occurs when you omit a revision number.
4.1.2
 * Can now do "tkdiff OLD-URL[@OLDREV] NEW-URL[@NEWREV]" in Subversion
4.1.1
 * Security patch for temp files (CVE-2005-4434)
4.1
 * Clearcase support
 * Better Subversion support
 * -L command line option allows you to control the labels above the diff
   file panes.
 * tkdiff --help or -h print a usage message for command line without
   invoking the GUI.
 * The New Diff Dialog is expanded so you can specify all the options.
 * The two panes can be resized relative to each other using a sash widget.