automv: lock the repository before searching for renames

I detected this while debugging something else.

hgext/automv.py

@@ -59,10 +59,13 def mvcheck(orig, ui, repo, *pats, **opt
     opts = pycompat.byteskwargs(opts)
     renames = None
     disabled = opts.pop(b'no_automv', False)
+    with repo.wlock():
     if not disabled:
         threshold = ui.configint(b'automv', b'similarity')
         if not 0 <= threshold <= 100:
-            raise error.Abort(_(b'automv.similarity must be between 0 and 100'))
+                raise error.Abort(
+                    _(b'automv.similarity must be between 0 and 100')
+                )
         if threshold > 0:
             match = scmutil.match(repo[None], pats, opts)
             added, removed = _interestingfiles(repo, match)
@@ -71,7 +74,6 def mvcheck(orig, ui, repo, *pats, **opt
                 repo, uipathfn, added, removed, threshold / 100.0
             )
 
-    with repo.wlock():
         if renames is not None:
             with repo.dirstate.changing_files(repo):
                 # XXX this should be wider and integrated with the commit