pullbundle: deal with another special case introduced by arbitrary ranges
previous, we dealt with the case where the tippest subrange of the stable parent
was too long. Now, we need to deal with the case where it is too small.
#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