automv: use lowercase for docstring title

The first line of docstring is used in `hg help -e`. Use lowercase to be
consistent with most extensions.

hgext/automv.py

@@ -1,100 +1,100
 # automv.py
 #
 # Copyright 2013-2016 Facebook, Inc.
 #
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2 or any later version.
-"""Check for unrecorded moves at commit time (EXPERIMENTAL)
+"""check for unrecorded moves at commit time (EXPERIMENTAL)
 
 This extension checks at commit/amend time if any of the committed files
 comes from an unrecorded mv.
 
 The threshold at which a file is considered a move can be set with the
 ``automv.similarity`` config option. This option takes a percentage between 0
 (disabled) and 100 (files must be identical), the default is 95.
 
 """
 
 # Using 95 as a default similarity is based on an analysis of the mercurial
 # repositories of the cpython, mozilla-central & mercurial repositories, as
 # well as 2 very large facebook repositories. At 95 50% of all potential
 # missed moves would be caught, as well as correspond with 87% of all
 # explicitly marked moves.  Together, 80% of moved files are 95% similar or
 # more.
 #
 # See http://markmail.org/thread/5pxnljesvufvom57 for context.
 
 from __future__ import absolute_import
 
 from mercurial.i18n import _
 from mercurial import (
     commands,
     copies,
     error,
     extensions,
     scmutil,
     similar
 )
 
 def extsetup(ui):
     entry = extensions.wrapcommand(
         commands.table, 'commit', mvcheck)
     entry[1].append(
         ('', 'no-automv', None,
          _('disable automatic file move detection')))
 
 def mvcheck(orig, ui, repo, *pats, **opts):
     """Hook to check for moves at commit time"""
     renames = None
     disabled = opts.pop('no_automv', False)
     if not disabled:
         threshold = ui.configint('automv', 'similarity', 95)
         if not 0 <= threshold <= 100:
             raise error.Abort(_('automv.similarity must be between 0 and 100'))
         if threshold > 0:
             match = scmutil.match(repo[None], pats, opts)
             added, removed = _interestingfiles(repo, match)
             renames = _findrenames(repo, match, added, removed,
                                    threshold / 100.0)
 
     with repo.wlock():
         if renames is not None:
             scmutil._markchanges(repo, (), (), renames)
         return orig(ui, repo, *pats, **opts)
 
 def _interestingfiles(repo, matcher):
     """Find what files were added or removed in this commit.
 
     Returns a tuple of two lists: (added, removed). Only files not *already*
     marked as moved are included in the added list.
 
     """
     stat = repo.status(match=matcher)
     added = stat[1]
     removed = stat[2]
 
     copy = copies._forwardcopies(repo['.'], repo[None], matcher)
     # remove the copy files for which we already have copy info
     added = [f for f in added if f not in copy]
 
     return added, removed
 
 def _findrenames(repo, matcher, added, removed, similarity):
     """Find what files in added are really moved files.
 
     Any file named in removed that is at least similarity% similar to a file
     in added is seen as a rename.
 
     """
     renames = {}
     if similarity > 0:
         for src, dst, score in similar.findrenames(
                 repo, added, removed, similarity):
             if repo.ui.verbose:
                 repo.ui.status(
                     _('detected move of %s as %s (%d%% similar)\n') % (
                         matcher.rel(src), matcher.rel(dst), score * 100))
             renames[dst] = src
     if renames:
         repo.ui.status(_('detected move of %d files\n') % len(renames))
     return renames