[issue13899] re pattern r"[\A]" should work like "A" but matches nothing. Ditto B and Z.

[Roundup Robot]

Roundup Robot added the comment:

New changeset 2bc04449fd8c by Ezio Melotti in branch '2.7':
#13899: \A, \Z, and \B now correctly match the A, Z, and B literals when used inside character classes (e.g. [A]).  Patch by Matthew Barnett.
http://hg.python.org/cpython/rev/2bc04449fd8c

New changeset 081db241ccda by Ezio Melotti in branch '3.2':
#13899: \A, \Z, and \B now correctly match the A, Z, and B literals when used inside character classes (e.g. [A]).  Patch by Matthew Barnett.
http://hg.python.org/cpython/rev/081db241ccda

New changeset 17b1eb4a8144 by Ezio Melotti in branch '3.3':
#13899: merge with 3.2.
http://hg.python.org/cpython/rev/17b1eb4a8144

New changeset 35ece2465936 by Ezio Melotti in branch 'default':
#13899: merge with 3.3.
http://hg.python.org/cpython/rev/35ece2465936

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nosy: +python-dev

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