[issue1738] filecmp.dircmp does exact match only

[Oliver Nelson]

New submission from Oliver Nelson:

dircmp's ignore and hide list only take exact files to ignore, not unix
filename pattern's.  This means you can't hide/ignore *.bak or something
similar.  Changing the _filter function adds this:

def newfilter(flist, skip):
  for pattern in skip:
    flist = list(ifilterfalse(fnmatch.filter(flist,
pattern).__contains__, flist))
  return flist

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Tracker <report at bugs.python.org>
<http://bugs.python.org/issue1738>
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