test: update the docstring of 'test-devel-warnings.t' extension

We are testing more than just locks now.

tests/test-devel-warnings.t

@@ -1,118 +1,118 b''
 
   $ cat << EOF > buggylocking.py
-  > """A small extension that acquire locks in the wrong order
+  > """A small extension that tests our developer warnings
   > """
   > 
   > from mercurial import cmdutil, repair, revset
   > 
   > cmdtable = {}
   > command = cmdutil.command(cmdtable)
   > 
   > @command('buggylocking', [], '')
   > def buggylocking(ui, repo):
   >     tr = repo.transaction('buggy')
   >     lo = repo.lock()
   >     wl = repo.wlock()
   >     wl.release()
   >     lo.release()
   > 
   > @command('properlocking', [], '')
   > def properlocking(ui, repo):
   >     """check that reentrance is fine"""
   >     wl = repo.wlock()
   >     lo = repo.lock()
   >     tr = repo.transaction('proper')
   >     tr2 = repo.transaction('proper')
   >     lo2 = repo.lock()
   >     wl2 = repo.wlock()
   >     wl2.release()
   >     lo2.release()
   >     tr2.close()
   >     tr.close()
   >     lo.release()
   >     wl.release()
   > 
   > @command('nowaitlocking', [], '')
   > def nowaitlocking(ui, repo):
   >     lo = repo.lock()
   >     wl = repo.wlock(wait=False)
   >     wl.release()
   >     lo.release()
   > 
   > @command('stripintr', [], '')
   > def stripintr(ui, repo):
   >     lo = repo.lock()
   >     tr = repo.transaction('foobar')
   >     try:
   >         repair.strip(repo.ui, repo, [repo['.'].node()])
   >     finally:
   >         lo.release()
   > 
   > def oldstylerevset(repo, subset, x):
   >     return list(subset)
   > 
   > revset.symbols['oldstyle'] = oldstylerevset
   > EOF
 
   $ cat << EOF >> $HGRCPATH
   > [extensions]
   > buggylocking=$TESTTMP/buggylocking.py
   > [devel]
   > all-warnings=1
   > EOF
 
   $ hg init lock-checker
   $ cd lock-checker
   $ hg buggylocking
   devel-warn: transaction with no lock at: $TESTTMP/buggylocking.py:11 (buggylocking)
   devel-warn: "wlock" acquired after "lock" at: $TESTTMP/buggylocking.py:13 (buggylocking)
   $ cat << EOF >> $HGRCPATH
   > [devel]
   > all=0
   > check-locks=1
   > EOF
   $ hg buggylocking
   devel-warn: transaction with no lock at: $TESTTMP/buggylocking.py:11 (buggylocking)
   devel-warn: "wlock" acquired after "lock" at: $TESTTMP/buggylocking.py:13 (buggylocking)
   $ hg buggylocking --traceback
   devel-warn: transaction with no lock at:
    */hg:* in * (glob)
    */mercurial/dispatch.py:* in run (glob)
    */mercurial/dispatch.py:* in dispatch (glob)
    */mercurial/dispatch.py:* in _runcatch (glob)
    */mercurial/dispatch.py:* in _dispatch (glob)
    */mercurial/dispatch.py:* in runcommand (glob)
    */mercurial/dispatch.py:* in _runcommand (glob)
    */mercurial/dispatch.py:* in checkargs (glob)
    */mercurial/dispatch.py:* in <lambda> (glob)
    */mercurial/util.py:* in check (glob)
    $TESTTMP/buggylocking.py:* in buggylocking (glob)
   devel-warn: "wlock" acquired after "lock" at:
    */hg:* in * (glob)
    */mercurial/dispatch.py:* in run (glob)
    */mercurial/dispatch.py:* in dispatch (glob)
    */mercurial/dispatch.py:* in _runcatch (glob)
    */mercurial/dispatch.py:* in _dispatch (glob)
    */mercurial/dispatch.py:* in runcommand (glob)
    */mercurial/dispatch.py:* in _runcommand (glob)
    */mercurial/dispatch.py:* in checkargs (glob)
    */mercurial/dispatch.py:* in <lambda> (glob)
    */mercurial/util.py:* in check (glob)
    $TESTTMP/buggylocking.py:* in buggylocking (glob)
   $ hg properlocking
   $ hg nowaitlocking
 
   $ echo a > a
   $ hg add a
   $ hg commit -m a
   $ hg stripintr
   saved backup bundle to $TESTTMP/lock-checker/.hg/strip-backup/cb9a9f314b8b-cc5ccb0b-backup.hg (glob)
   abort: programming error: cannot strip from inside a transaction
   (contact your extension maintainer)
   [255]
 
   $ hg log -r "oldstyle()" -T '{rev}\n'
   devel-warn: revset "oldstyle" use list instead of smartset, (upgrade your code) at: */mercurial/revset.py:* (mfunc) (glob)
   0
 
   $ cd ..