basectx: move __iter__ from changectx

mercurial/context.py

@@ -59,6 +59,10 b' class basectx(object):'
     def __getitem__(self, key):
         return self.filectx(key)
 
+    def __iter__(self):
+        for f in sorted(self._manifest):
+            yield f
+
     @propertycache
     def substate(self):
         return subrepo.state(self, self._repo.ui)
@@ -203,10 +207,6 b' class changectx(basectx):'
             p = p[:-1]
         return [changectx(self._repo, x) for x in p]
 
-    def __iter__(self):
-        for f in sorted(self._manifest):
-            yield f
-
     def changeset(self):
         return self._changeset
     def manifest(self):