[issue33896] Document what components make up the filecmp.cmp os.stat signature.

[R. David Murray]

R. David Murray <rdmurray at bitdance.com> added the comment:

I think it might be OK to document what goes in to the signature, but probably in a footnote, as it is somewhat of an implementation detail and could conceivably change.  We could then also add a caution about mtime imprecision being a particular risk on some file systems.  I wouldn't want to put such a caution in the main doc paragraphs, but in a footnote I think it would be OK.

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resolution: rejected -> 
stage: resolved -> needs patch
status: closed -> open
title: filecmp.cmp returns True on files that differ -> Document what components make up the filecmp.cmp os.stat signature.
versions: +Python 3.8 -Python 2.7, Python 3.4, Python 3.5

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<https://bugs.python.org/issue33896>
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