evolve: make `--continue` continue evolving all remaining revisions
This patch makes `hg evolve --continue` to continue all remaining revisions
instead of just the current conflicted one.
There are some still improvements required to this behavior after which the
CHANGELOG entry will be added.
#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