comparison tests/test-help.t @ 50304:805d4a462abb stable

py3: fix for Python 3.12 emitting SyntaxWarning on invalid escape sequences

Mercurial became very noisy after https://github.com/python/cpython/commit/a60ddd31be7ff96a8189e7483bf1eb2071d2bddf ,
for example:

  $ python3.12 mercurial/store.py
  mercurial/store.py:406: SyntaxWarning: invalid escape sequence '\.'
    EXCLUDED = re.compile(b'.*undo\.[^/]+\.(nd?|i)$')

This verbosity made some tests fail.

The problems were mostly insufficiently escaped regexps, relying on the Python
parser/scanner preserving invalid escape sequences.

50303:0d3690f8ce2a

This tests that section lookup by translated string isn't broken by
such str.lower().

  $ "$PYTHON" <<EOF
  > def escape(s):
  >     return b''.join(b'\\u%x' % ord(uc) for uc in s.decode('cp932'))
  > # translation of "record" in ja_JP.cp932
  > upper = b"\x8bL\x98^"
  > # str.lower()-ed section name should be treated as different one
  > lower = b"\x8bl\x98^"
  > with open('ambiguous.py', 'wb') as fp:

50304:805d4a462abb

This tests that section lookup by translated string isn't broken by
such str.lower().

  $ "$PYTHON" <<EOF
  > def escape(s):
  >     return b''.join(br'\\u%x' % ord(uc) for uc in s.decode('cp932'))
  > # translation of "record" in ja_JP.cp932
  > upper = b"\x8bL\x98^"
  > # str.lower()-ed section name should be treated as different one
  > lower = b"\x8bl\x98^"
  > with open('ambiguous.py', 'wb') as fp: