[docs] [issue22155] Out of date code example for tkinter's createfilehandler

[Roundup Robot]

Roundup Robot added the comment:

New changeset 8bd9da5635fe by Terry Jan Reedy in branch '3.4':
Issue #22155: News entry.
https://hg.python.org/cpython/rev/8bd9da5635fe

New changeset 850cbd54cc73 by Terry Jan Reedy in branch 'default':
Issue #22155: News entry.
https://hg.python.org/cpython/rev/850cbd54cc73

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<http://bugs.python.org/issue22155>
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