rewind: obsolete latest successors unless instructed otherwise
To prevent the creations of divergence, we automatically mark the successors set
of the rewinded changeset as obsoleted by the rewind result. A new flag
`--as-divergence` is added to disable this behavior.
#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