narrow: widden the lock context in `tracking`

The tracking configuration we modify must be read under lock. So we grab the
lock sooner.

hgext/narrow/narrowcommands.py

@@ -579,6 +579,7 b' def trackedcmd(ui, repo, remotepath=None'
         fm.end()
         return 0
 
+    with repo.wlock(), repo.lock():
     oldincludes, oldexcludes = repo.narrowpats
 
     # filter the user passed additions and deletions into actual additions and
@@ -592,9 +593,9 b' def trackedcmd(ui, repo, remotepath=None'
     narrowing = removedincludes or addedexcludes
 
     if update_working_copy:
-        with repo.wlock(), repo.lock(), repo.transaction(
-            b'narrow-wc'
-        ), repo.dirstate.changing_parents(repo):
+            with repo.transaction(b'narrow-wc'), repo.dirstate.changing_parents(
+                repo
+            ):
             narrowspec.updateworkingcopy(repo)
             narrowspec.copytoworkingcopy(repo)
         return 0
@@ -603,7 +604,6 b' def trackedcmd(ui, repo, remotepath=None'
         ui.status(_(b"nothing to widen or narrow\n"))
         return 0
 
-    with repo.wlock(), repo.lock():
         cmdutil.bailifchanged(repo)
 
         # Find the revisions we have in common with the remote. These will