[docs] [issue22797] urllib.request.urlopen documentation falsely guarantees that a URLError will be raised on errors

[Roundup Robot]

Roundup Robot added the comment:

New changeset 2d69d0419879 by Martin Panter in branch 'default':
Issue #22797: Synchronize urlopen() doc string with RST documentation
https://hg.python.org/cpython/rev/2d69d0419879

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