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There were bugs in two of the updated tests:
- test_glob_to_re() was doing two levels of escaping (r'\' -> r'\\\\')
 for its expected output when it should only do one (r'\' -> r'\\').
- test_process_template() was not converting some of its expected
 results to use the native directory separator.
I've attached a patch that fixes these issues. I also took the liberty of
changing the checks for whether the separator needs to be escaped - it's
better to escape everything except "/", just in case someone decides to
port Python to some platform using a weird directory separator that is
neither "/" nor r"\".
With my updated patch, all tests pass on both Windows and Linux, and I've
also manually verified that the buildout.cfg problem and the
sandbox/dummy.py problem (from issue 9691) are both fixed.
Please review (and commit, if my changes are OK).