[docs] [issue22062] Fix pathlib.Path.(r)glob doc glitches.

[Steve Dower]

Change by Steve Dower <steve.dower at python.org>:


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versions: +Python 3.6, Python 3.7, Python 3.8 -Python 3.4, Python 3.5

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue22062>
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