[docs] [issue29677] clarify docs about 'round()' accepting a negative integer for ndigits

[Mariatta Wijaya]

Mariatta Wijaya added the comment:


New changeset 2609c9ee78c53d501914a5a90dbe094d9a8c3c97 by Mariatta in branch '3.6':
bpo-29677: DOC: clarify documentation for `round` (GH-877) (GH-892)
https://github.com/python/cpython/commit/2609c9ee78c53d501914a5a90dbe094d9a8c3c97


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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue29677>
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