[issue11828] startswith and endswith don't accept None as slice index

[Torsten Becker]

Torsten Becker <torsten.becker at gmail.com> added the comment:

Hi, since nobody stopped me by complaining about the approach or the first patch, I now fixed this for bytes and bytearray as well. :)

I renamed the old _ParseTupleFinds function to stringlib_parse_tuple_finds, added a parameter for function name, and another if it shall do unicode conversion.  I used this helper function throughout all 3 files now.

I am new to writing C code for Python, so any comments on how to improve the patch are welcome.

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Added file: http://bugs.python.org/file21629/issue-11828-v3.patch

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