revset: reduce dict lookup in lazyset.__contains__
Avoid an extra dict lookup when we have to compute the value. No
visible performance impact but this shaves the yak a few extra
nanometers.
#!/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)