fileset: add missing() predicate (issue4925)
Help of status cmd defines status file of 'missing', what is
called in fileset 'deleted'. To stay consistent this patch
introduces missing() predicate which in fact is alias to
'deleted'.
#require test-repo pyflakes
$ cd "`dirname "$TESTDIR"`"
run pyflakes on all tracked files ending in .py or without a file ending
(skipping binary file random-seed)
$ hg locate 'set:**.py or grep("^!#.*python")' 2>/dev/null \
> | xargs pyflakes 2>/dev/null | "$TESTDIR/filterpyflakes.py"
tests/filterpyflakes.py:58: undefined name 'undefinedname'