[docs] [issue35609] Improve of abc.py docstring

Dec. 31, 2018


      Change by Serhiy Storchaka <storchaka+cpython@gmail.com>:


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resolution:  -> fixed
stage: patch review -> resolved
status: open -> closed

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Python tracker <report@bugs.python.org>
<https://bugs.python.org/issue35609>
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