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

[Cheryl Sabella]

Change by Cheryl Sabella <cheryl.sabella at gmail.com>:


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assignee:  -> docs at python
components: +Documentation -Library (Lib)
nosy: +docs at python
versions:  -Python 3.6

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue33896>
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