check-code: fix issues with finding patterns in unified tests, fix tests - old-style patterns without ^ were getting improperly anchored - finditer was matching against beginning of line poorly - \s was matching newlines - [^x] was matching newlines so we: - remove earlier hacks for multiline matching - fix unified test anchoring by adding .* - replace \s with [ \t] - replace [^x] with [^\nx] - force all matches into multiline mode so ^ anchors work This uncovers a number of test issues that are then repaired.

  $ "$TESTDIR/hghave" pyflakes || exit 80
  $ cd `dirname $TESTDIR`
  $ pyflakes mercurial hgext 2>&1 | $TESTDIR/filterpyflakes.py
  hgext/inotify/linux/__init__.py:*: 'from _inotify import *' used; unable to detect undefined names (glob)