gh-45 address errors for tcl/tk 9 used by homebrew users on MacOS #55
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Resolves #45
Although official builds of Python bundle tcl/tk 8.6 and virtually every third party build of Python and every distribution of tcl/tk for such builds use tcl/tk 8.6, for some reason, the homebrew formulae for
python-tkversions 3.12 and 3.13 are not bound to tcl/tk 8, meaning users of homebrew may end up with a tcl/tk version that is not compatible. Specifically, thetracemethod is not supported in tcl 9, though thetkintermodule in Python continues to offer this API (although deprecated).This PR works around this problem.
Similar incompatibilities with tcl/tk 9 may continue to exist. This only addresses this one instance. It does not imply tcl/tk 9 is supported.