tests: reduce dependence on previous tests for setup
The tests in test-evolve-phase-divergence.t built on each other for no
good reason, which makes the tests hard to modify and hard to read.
This patch cleans up some of them. We should clean up the rest too,
but the rest won't matter for my next patch, so I haven't bothered.
#require test-repo
$ checkflake8() {
> if ! (which flake8 > /dev/null); then
> echo skipped: missing tool: flake8;
> exit 80;
> fi;
> };
$ checkflake8
Copied from Mercurial core (60ee2593a270)
$ cd "`dirname "$TESTDIR"`"
run flake8 if it exists; if it doesn't, then just skip
$ hg files -0 'set:(**.py or grep("^#!.*python")) - removed()' \
> -X hgext3rd/evolve/thirdparty \
> 2>/dev/null \
> | xargs -0 flake8