basectx: move __ne__ from changectx

mercurial/context.py

@@ -50,6 +50,9 b' class basectx(object):'
         except AttributeError:
             return False
 
+    def __ne__(self, other):
+        return not (self == other)
+
     def rev(self):
         return self._rev
     def node(self):
@@ -168,9 +171,6 b' class changectx(basectx):'
         except AttributeError:
             return id(self)
 
-    def __ne__(self, other):
-        return not (self == other)
-
     def __nonzero__(self):
         return self._rev != nullrev