test-histedit: fix instability creation test

The current test does not rewrite anything and therefor does not create any
instability.

We also clean up the repo state after the test. This required the rebase
extension.

tests/test-histedit-obsolete.t

@@ -1,155 +1,173 b''
   $ . "$TESTDIR/histedit-helpers.sh"
 
 Enable obsolete
 
   $ cat > ${TESTTMP}/obs.py << EOF
   > import mercurial.obsolete
   > mercurial.obsolete._enabled = True
   > EOF
 
   $ cat >> $HGRCPATH << EOF
   > [ui]
   > logtemplate= {rev}:{node|short} {desc|firstline}
   > [phases]
   > publish=False
   > [extensions]'
   > histedit=
+  > rebase=
   > 
   > obs=${TESTTMP}/obs.py
   > EOF
 
   $ hg init base
   $ cd base
 
   $ for x in a b c d e f ; do
   >     echo $x > $x
   >     hg add $x
   >     hg ci -m $x
   > done
 
   $ hg log --graph
   @  5:652413bf663e f
   |
   o  4:e860deea161a e
   |
   o  3:055a42cdd887 d
   |
   o  2:177f92b77385 c
   |
   o  1:d2ae7f538514 b
   |
   o  0:cb9a9f314b8b a
   
 
   $ HGEDITOR=cat hg histedit 1
   pick d2ae7f538514 1 b
   pick 177f92b77385 2 c
   pick 055a42cdd887 3 d
   pick e860deea161a 4 e
   pick 652413bf663e 5 f
   
   # Edit history between d2ae7f538514 and 652413bf663e
   #
   # Commands:
   #  p, pick = use commit
   #  e, edit = use commit, but stop for amending
   #  f, fold = use commit, but fold into previous commit (combines N and N-1)
   #  d, drop = remove commit from history
   #  m, mess = edit message without changing commit content
   #
   0 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ cat > commands.txt <<EOF
   > pick 177f92b77385 2 c
   > drop d2ae7f538514 1 b
   > pick 055a42cdd887 3 d
   > fold e860deea161a 4 e
   > pick 652413bf663e 5 f
   > EOF
   $ hg histedit 1 --commands commands.txt --verbose | grep histedit
   saved backup bundle to $TESTTMP/base/.hg/strip-backup/96e494a2d553-backup.hg (glob)
   $ hg log --graph --hidden
   @  8:cacdfd884a93 f
   |
   o  7:59d9f330561f d
   |
   o  6:b346ab9a313d c
   |
   | x  5:652413bf663e f
   | |
   | x  4:e860deea161a e
   | |
   | x  3:055a42cdd887 d
   | |
   | x  2:177f92b77385 c
   | |
   | x  1:d2ae7f538514 b
   |/
   o  0:cb9a9f314b8b a
   
   $ hg debugobsolete
   d2ae7f538514cd87c17547b0de4cea71fe1af9fb 0 {'date': '* *', 'user': 'test'} (glob)
   177f92b773850b59254aa5e923436f921b55483b b346ab9a313db8537ecf96fca3ca3ca984ef3bd7 0 {'date': '* *', 'user': 'test'} (glob)
   055a42cdd88768532f9cf79daa407fc8d138de9b 59d9f330561fd6c88b1a6b32f0e45034d88db784 0 {'date': '* *', 'user': 'test'} (glob)
   e860deea161a2f77de56603b340ebbb4536308ae 59d9f330561fd6c88b1a6b32f0e45034d88db784 0 {'date': '* *', 'user': 'test'} (glob)
   652413bf663ef2a641cab26574e46d5f5a64a55a cacdfd884a9321ec4e1de275ef3949fa953a1f83 0 {'date': '* *', 'user': 'test'} (glob)
 
 
 Ensure hidden revision does not prevent histedit
 -------------------------------------------------
 
 create an hidden revision
 
   $ cat > commands.txt <<EOF
   > pick b346ab9a313d 6 c
   > drop 59d9f330561f 7 d
   > pick cacdfd884a93 8 f
   > EOF
   $ hg histedit 6 --commands commands.txt
   0 files updated, 0 files merged, 3 files removed, 0 files unresolved
   0 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ hg log --graph
   @  9:c13eb81022ca f
   |
   o  6:b346ab9a313d c
   |
   o  0:cb9a9f314b8b a
   
 check hidden revision are ignored (6 have hidden children 7 and 8)
 
   $ cat > commands.txt <<EOF
   > pick b346ab9a313d 6 c
   > pick c13eb81022ca 8 f
   > EOF
   $ hg histedit 6 --commands commands.txt
   0 files updated, 0 files merged, 0 files removed, 0 files unresolved
 
 
 Check that histedit respect phases
 =========================================
 
 (not directly related to the test file but doesn't deserve it's own test case)
 
   $ hg log -G
   @  9:c13eb81022ca f
   |
   o  6:b346ab9a313d c
   |
   o  0:cb9a9f314b8b a
   
   $ hg ph -pv '.^'
   phase changed for 2 changesets
   $ hg histedit -r '.~2'
   abort: cannot edit immutable changeset: cb9a9f314b8b
   [255]
 
 
 Test that rewriting leaving instability behind is allowed
 ---------------------------------------------------------------------
 
   $ hg up '.^'
   0 files updated, 0 files merged, 1 files removed, 0 files unresolved
-  $ hg phase --force --draft .
+  $ hg ph --force --draft '.'
   $ hg log -r 'children(.)'
   9:c13eb81022ca f (no-eol)
-  $ hg histedit -r '.'
+  $ cat > commands.txt <<EOF
+  > edit b346ab9a313d 6 c
+  > EOF
+  $ hg histedit -r '.' --commands commands.txt
+  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
+  adding c
+  abort: Make changes as needed, you may commit or record as needed now.
+  When you are finished, run hg histedit --continue to resume.
+  [255]
+  $ echo c >> c
+  $ hg histedit --continue
   0 files updated, 0 files merged, 0 files removed, 0 files unresolved
+
+  $ hg log -r 'unstable()'
+  9:c13eb81022ca f (no-eol)
+
+stabilise
+
+  $ hg rebase  -r 'unstable()' -d .