test-evolve-bumped: improve tests legibility
This patch introduces in test-evolve-bumped some of the test helpers that we
use in other tests to make the code more legible.
$ hg init public
$ cd public
$ echo a > a
$ hg commit -A -m init
adding a
$ cd ..
$ evolvepath=$(echo $(dirname $TESTDIR))/hgext/evolve.py
$ hg clone -U public private
$ cd private
$ cat >> .hg/hgrc <<EOF
> [extensions]
> evolve = $evolvepath
> [ui]
> logtemplate = {rev}:{node|short}@{branch}({phase}) {desc|firstline}\n
> [phases]
> publish = false
> EOF
$ cd ..
$ cp -a private alice
$ cp -a private bob
$ cd alice
$ hg update
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ echo a >> a
$ hg commit -u alice -m 'modify a'
$ hg push ../private
pushing to ../private
searching for changes
adding changesets
adding manifests
adding file changes
added 1 changesets with 1 changes to 1 files
$ hg log -r 'draft()'
1:4d1169d82e47@default(draft) modify a
$ cd ../bob
$ hg pull ../private
pulling from ../private
searching for changes
adding changesets
adding manifests
adding file changes
added 1 changesets with 1 changes to 1 files
(run 'hg update' to get a working copy)
$ hg log -r 'draft()'
1:4d1169d82e47@default(draft) modify a
$ hg push ../public
pushing to ../public
searching for changes
adding changesets
adding manifests
adding file changes
added 1 changesets with 1 changes to 1 files
$ hg log -r 'draft()'
$ cd ../alice
$ hg amend -m 'tweak a'
$ hg pull ../public
pulling from ../public
searching for changes
no changes found
1 new bumped changesets
$ hg evolve -a --bumped
recreate:[2] tweak a
atop:[1] modify a
computing new diff
committed as 4d1169d82e47
working directory is now at 4d1169d82e47