debugobshashrange: add a --subranges option
We stop displaying -everything- by default, since is is usually very large. This
will help getting better timing when measuring cache effect too, since we won't
need to dig out deep cache value that real life usage would not touch.
#require test-repo pyflakes
Copied from Mercurial core (60ee2593a270)
$ 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")) - removed()' 2>/dev/null \
> | xargs pyflakes 2>/dev/null