[docs] [issue17188] Document 'from None' in raise statement doc.

[Mariatta Wijaya]

Mariatta Wijaya added the comment:


New changeset 00b381b9a7b6b15350d1dcf7c688bf808cbf0ebb by Mariatta (csabella) in branch '3.6':
bpo-17188: DOC: Document 'from None' in raise statement (GH-1671) (GH-1867)
https://github.com/python/cpython/commit/00b381b9a7b6b15350d1dcf7c688bf808cbf0ebb


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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue17188>
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