In the directory tcl-debug-1.0 you will find a slightly modified
version of Don Libes' Tcl debugger.  The changes I have made are as
follows:

* The debugger's output and interactor functions now get a ClientData
  argument.  This required changes in the interface to various
  functions.

* I fixed a bug where the debugger didn't print a string via the
  output function.
