[docs] [issue25179] PEP 498 f-strings need to be documented

[Roundup Robot]

Roundup Robot added the comment:

New changeset f4d7de7d18c0 by Martin Panter in branch 'default':
Issue #25179: Documentation for formatted string literals aka f-strings
https://hg.python.org/cpython/rev/f4d7de7d18c0

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue25179>
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