[3.12] Replace the esoteric term 'datum' when describing dict compreh…

…ensions (GH-106119) (#106348)

Replace the esoteric term 'datum' when describing dict comprehensions (GH-106119)
(cherry picked from commit 987b712)

Co-authored-by: Ned Batchelder <ned@nedbatchelder.com>

Doc/reference/expressions.rst

@@ -298,27 +298,27 @@ Dictionary displays
 .. index::
    pair: dictionary; display
    pair: dictionary; comprehensions
-   key, datum, key/datum pair
+   key, value, key/value pair
    pair: object; dictionary
    single: {} (curly brackets); dictionary expression
    single: : (colon); in dictionary expressions
    single: , (comma); in dictionary displays
 
-A dictionary display is a possibly empty series of key/datum pairs enclosed in
-curly braces:
+A dictionary display is a possibly empty series of dict items (key/value pairs)
+enclosed in curly braces:
 
 .. productionlist:: python-grammar
-   dict_display: "{" [`key_datum_list` | `dict_comprehension`] "}"
-   key_datum_list: `key_datum` ("," `key_datum`)* [","]
-   key_datum: `expression` ":" `expression` | "**" `or_expr`
+   dict_display: "{" [`dict_item_list` | `dict_comprehension`] "}"
+   dict_item_list: `dict_item` ("," `dict_item`)* [","]
+   dict_item: `expression` ":" `expression` | "**" `or_expr`
    dict_comprehension: `expression` ":" `expression` `comp_for`
 
 A dictionary display yields a new dictionary object.
 
-If a comma-separated sequence of key/datum pairs is given, they are evaluated
+If a comma-separated sequence of dict items is given, they are evaluated
 from left to right to define the entries of the dictionary: each key object is
-used as a key into the dictionary to store the corresponding datum.  This means
-that you can specify the same key multiple times in the key/datum list, and the
+used as a key into the dictionary to store the corresponding value.  This means
+that you can specify the same key multiple times in the dict item list, and the
 final dictionary's value for that key will be the last one given.
 
 .. index::
@@ -328,7 +328,7 @@ final dictionary's value for that key will be the last one given.
 A double asterisk ``**`` denotes :dfn:`dictionary unpacking`.
 Its operand must be a :term:`mapping`.  Each mapping item is added
 to the new dictionary.  Later values replace values already set by
-earlier key/datum pairs and earlier dictionary unpackings.
+earlier dict items and earlier dictionary unpackings.
 
 .. versionadded:: 3.5
    Unpacking into dictionary displays, originally proposed by :pep:`448`.
@@ -344,7 +344,7 @@ in the new dictionary in the order they are produced.
 Restrictions on the types of the key values are listed earlier in section
 :ref:`types`.  (To summarize, the key type should be :term:`hashable`, which excludes
 all mutable objects.)  Clashes between duplicate keys are not detected; the last
-datum (textually rightmost in the display) stored for a given key value
+value (textually rightmost in the display) stored for a given key value
 prevails.
 
 .. versionchanged:: 3.8

Doc/reference/simple_stmts.rst

@@ -210,7 +210,7 @@ Assignment of an object to a single target is recursively defined as follows.
 
   If the primary is a mapping object (such as a dictionary), the subscript must
   have a type compatible with the mapping's key type, and the mapping is then
-  asked to create a key/datum pair which maps the subscript to the assigned
+  asked to create a key/value pair which maps the subscript to the assigned
   object.  This can either replace an existing key/value pair with the same key
   value, or insert a new key/value pair (if no key with the same value existed).