keyword: make kwdemo less verbose

1) Set the branchname always silently with
   dirstate.setbranch().
   We create a branch so that testing the {branches} template
   does not come up empty. But kwdemo is hardly the place to
   inform the user by inference why {branches} is empty on the
   default branch.
   "demobranch" is ascii and cannot be changed, so using the
   internal command instead of commands.branch() is safe.
2) Do not show full path to temporary directory
   (distracting long lines on Mac OS X).
3) No special debug output. Output only related to keyword,
   no internals like unsetting of commit hooks etc.

hgext/keyword.py

@@ -287,7 +287,6 b' def demo(ui, repo, *args, **opts):'
             ui.write('%s = %s\n' % (k, v))
 
     fn = 'demo.txt'
-    branchname = 'demobranch'
     tmpdir = tempfile.mkdtemp('', 'kwdemo.')
     ui.note(_('creating temporary repository at %s\n') % tmpdir)
     repo = localrepo.localrepository(ui, tmpdir, True)
@@ -333,25 +332,17 b' def demo(ui, repo, *args, **opts):'
     keywords = '$' + '$\n$'.join(sorted(kwmaps.keys())) + '$\n'
     repo.wopener(fn, 'w').write(keywords)
     repo.add([fn])
-    path = repo.wjoin(fn)
-    ui.note(_('\nkeywords written to %s:\n') % path)
+    ui.note(_('\nkeywords written to %s:\n') % fn)
     ui.note(keywords)
-    ui.note('\nhg -R "%s" branch "%s"\n' % (tmpdir, branchname))
-    # silence branch command if not verbose
-    quiet = ui.quiet
-    ui.quiet = not ui.verbose
-    commands.branch(ui, repo, branchname)
-    ui.quiet = quiet
+    repo.dirstate.setbranch('demobranch')
     for name, cmd in ui.configitems('hooks'):
         if name.split('.', 1)[0].find('commit') > -1:
             repo.ui.setconfig('hooks', name, '')
-    ui.note(_('unhooked all commit hooks\n'))
     msg = _('hg keyword configuration and expansion example')
-    ui.note("hg -R '%s' ci -m '%s'\n" % (tmpdir, msg))
+    ui.note("hg ci -m '%s'\n" % msg)
     repo.commit(text=msg)
     ui.status(_('\n\tkeywords expanded\n'))
     ui.write(repo.wread(fn))
-    ui.debug('\nremoving temporary repository %s\n' % tmpdir)
     shutil.rmtree(tmpdir, ignore_errors=True)
 
 def expand(ui, repo, *pats, **opts):