[issue7579] Patch to add docstrings to msvcrt

[Brian Curtin]

Brian Curtin <curtin at acm.org> added the comment:

Here is a patch for py3k. It uses the same contents as before but with
changes to the str/bytes wording on getch_doc, putch_doc, and
ungetch_doc. Includes updates to the msvcrt.rst file. Let me know if the
wording seems correct (or if I left anything out).

I went ahead and added docstrings to the debug-only functions as a bonus.

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Added file: http://bugs.python.org/file15704/issue7579_py3k.diff

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