topic: support --rev argument and properly process then as user input
Revisions inputed by the users should be processed using `scmutil.revrange`.
This will take alias into account and allow extensions to monitor the user
inputs.
As a side effect, the '_changetopics' function takes revisions as argument.
make the API clearer.
#require test-repo
$ checkcm() {
> if ! (which check-manifest > /dev/null); then
> echo skipped: missing tool: check-manifest;
> exit 80;
> fi;
> };
$ checkcm
$ cat << EOF >> $HGRCPATH
> [experimental]
> evolution=all
> EOF
Run check manifest:
$ cd $TESTDIR/..
$ check-manifest
lists of files in version control and sdist match