evolve: don't make values of replacements dict lists
There was inconsistency in code base related to the values stored in
replacements dict in evolvestate. At some places we store a list, at some places
we just store the nodeid. Let's make sure we store only the nodeid, not a list.
If there are cases, when there are multiple replacements or changesets created
during resolution, later patch will introduce storing temprevs in evolvestate
which should be used.
#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