[docs] [issue19691] Weird wording in RuntimeError doc

[Roundup Robot]

Roundup Robot added the comment:

New changeset 6aeaaa614a19 by Antoine Pitrou in branch '3.3':
Issue #19691: remove outdated mention about RuntimeError
http://hg.python.org/cpython/rev/6aeaaa614a19

New changeset f4de1c5e381d by Antoine Pitrou in branch 'default':
Issue #19691: remove outdated mention about RuntimeError
http://hg.python.org/cpython/rev/f4de1c5e381d

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue19691>
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