basectx: move dirs from changectx

mercurial/context.py

@@ -142,6 +142,9 b' class basectx(object):'
     def _dirs(self):
         return scmutil.dirs(self._manifest)
 
+    def dirs(self):
+        return self._dirs
+
 class changectx(basectx):
     """A changecontext object makes access to data related to a particular
     changeset convenient. It represents a read-only context already presnt in
@@ -403,9 +406,6 b' class changectx(basectx):'
             if match.bad(fn, _('no such file in rev %s') % self) and match(fn):
                 yield fn
 
-    def dirs(self):
-        return self._dirs
-
     def dirty(self):
         return False