[docs] [issue15831] comma after leading optional argument is after bracket in docs

[Roundup Robot]

Roundup Robot added the comment:

New changeset b01eb870f84f by Ezio Melotti in branch '3.2':
#15831: document multiple signatures on different lines.  Patch by Chris Jerdonek.
http://hg.python.org/cpython/rev/b01eb870f84f

New changeset 0ed61ee823d8 by Ezio Melotti in branch 'default':
#15831: merge with 3.2
http://hg.python.org/cpython/rev/0ed61ee823d8

New changeset 2291aff20a05 by Ezio Melotti in branch '2.7':
#15831: document multiple signatures on different lines.  Patch by Chris Jerdonek.
http://hg.python.org/cpython/rev/2291aff20a05

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nosy: +python-dev

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<http://bugs.python.org/issue15831>
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