rewrite: use cmdutil.logmessage instead of ad-hoc methods
The logic for handling the --message and --logfile options is already
in core hg in the cmdutil.logmessage function. This patch removes this
duplicate logic from Evolve and just calls the core function.
$ cat >> $HGRCPATH <<EOF
> [extensions]
> hgext.rebase=
> hgext.graphlog=
> EOF
$ echo "evolve=$(echo $(dirname $TESTDIR))/hgext/evolve.py" >> $HGRCPATH
hg prev should move active bookmark
$ hg init
$ touch a
$ hg add a
$ hg commit -m 'added a'
$ touch b
$ hg add b
$ hg commit -m 'added b'
$ hg bookmark mark
$ hg bookmarks
* mark 1:6e742c9127b3
$ hg prev
0 files updated, 0 files merged, 1 files removed, 0 files unresolved
[0] added a
$ hg bookmarks
* mark 0:a154386e50d1
hg next should move active bookmark
$ hg next
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
[1] added b
$ hg bookmarks
* mark 1:6e742c9127b3
hg next/prev should not interfere with inactive bookmarks
$ touch c
$ hg add c
$ hg commit -m 'added c'
$ hg bookmark -r2 no-move
$ hg prev
0 files updated, 0 files merged, 1 files removed, 0 files unresolved
[1] added b
$ hg bookmarks
* mark 1:6e742c9127b3
no-move 2:4e26ef31f919
$ hg next
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
[2] added c
$ hg bookmarks
* mark 2:4e26ef31f919
no-move 2:4e26ef31f919
$ hg up 1
0 files updated, 0 files merged, 1 files removed, 0 files unresolved
$ hg next
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
[2] added c
$ hg bookmarks
mark 2:4e26ef31f919
no-move 2:4e26ef31f919
$ hg prev
0 files updated, 0 files merged, 1 files removed, 0 files unresolved
[1] added b
$ hg bookmarks
mark 2:4e26ef31f919
no-move 2:4e26ef31f919