bpo-29952: Use usual terminology of dict (GH-922)

methane · web-flow · commit 4c75fbb485c0 · 2017-03-31T15:43:10.000+09:00
s/keys and elements/keys and values/ (cherry picked from commit cdcac03)
diff --git a/Doc/reference/expressions.rst b/Doc/reference/expressions.rst
@@ -1355,7 +1355,7 @@ built-in types.
     true).
 
 * Mappings (instances of :class:`dict`) compare equal if and only if they have
-  equal `(key, value)` pairs. Equality comparison of the keys and elements
+  equal `(key, value)` pairs. Equality comparison of the keys and values
   enforces reflexivity.
 
   Order comparisons (``<``, ``>``, ``<=``, and ``>=``) raise :exc:`TypeError`.
