tests/readlink.py

test-histedit-edit: add test that demonstrates bug in issue4704

Durham and I agree that it's a bug you can fold into a change that's
not listed in the histedited set, so we'll follow this up with a
change that prevents folds as the first edit step.

#!/usr/bin/env python

import errno, os, sys

for f in sys.argv[1:]:
    try:
        print f, '->', os.readlink(f)
    except OSError, err:
        if err.errno != errno.EINVAL:
            raise
        print f, 'not a symlink'

sys.exit(0)