bpo-29952: Use usual terminology of dict (GH-917)

bpo-29952: Use usual terminology of dict (GH-917) · python/cpython@cdcac03

Original file line number	Diff line number	Diff line change
`@@ -1355,7 +1355,7 @@ built-in types.`
`1355`	`1355`	`true).`
`1356`	`1356`
`1357`	`1357`	* Mappings (instances of :class:`dict`) compare equal if and only if they have
`1358`		- equal `(key, value)` pairs. Equality comparison of the keys and elements
	`1358`	+ equal `(key, value)` pairs. Equality comparison of the keys and values
`1359`	`1359`	`enforces reflexivity.`
`1360`	`1360`
`1361`	`1361`	Order comparisons (``<``, ``>``, ``<=``, and ``>=``) raise :exc:`TypeError`.