#18951: use consistent names in unittest docs.

Doc/library/unittest.rst

@@ -815,14 +815,14 @@ Test cases
    | :meth:`assertRaises(exc, fun, *args, **kwds)            | ``fun(*args, **kwds)`` raises *exc*  |            |
    | <TestCase.assertRaises>`                                |                                      |            |
    +---------------------------------------------------------+--------------------------------------+------------+
-   | :meth:`assertRaisesRegex(exc, re, fun, *args, **kwds)   | ``fun(*args, **kwds)`` raises *exc*  | 3.1        |
-   | <TestCase.assertRaisesRegex>`                           | and the message matches *re*         |            |
+   | :meth:`assertRaisesRegex(exc, r, fun, *args, **kwds)    | ``fun(*args, **kwds)`` raises *exc*  | 3.1        |
+   | <TestCase.assertRaisesRegex>`                           | and the message matches regex *r*    |            |
    +---------------------------------------------------------+--------------------------------------+------------+
    | :meth:`assertWarns(warn, fun, *args, **kwds)            | ``fun(*args, **kwds)`` raises *warn* | 3.2        |
    | <TestCase.assertWarns>`                                 |                                      |            |
    +---------------------------------------------------------+--------------------------------------+------------+
-   | :meth:`assertWarnsRegex(warn, re, fun, *args, **kwds)   | ``fun(*args, **kwds)`` raises *warn* | 3.2        |
-   | <TestCase.assertWarnsRegex>`                            | and the message matches *re*         |            |
+   | :meth:`assertWarnsRegex(warn, r, fun, *args, **kwds)    | ``fun(*args, **kwds)`` raises *warn* | 3.2        |
+   | <TestCase.assertWarnsRegex>`                            | and the message matches regex *r*    |            |
    +---------------------------------------------------------+--------------------------------------+------------+
 
    .. method:: assertRaises(exception, callable, *args, **kwds)
@@ -978,10 +978,10 @@ Test cases
    | :meth:`assertLessEqual(a, b)          | ``a <= b``                     | 3.1          |
    | <TestCase.assertLessEqual>`           |                                |              |
    +---------------------------------------+--------------------------------+--------------+
-   | :meth:`assertRegex(s, re)             | ``regex.search(s)``            | 3.1          |
+   | :meth:`assertRegex(s, r)              | ``r.search(s)``                | 3.1          |
    | <TestCase.assertRegex>`               |                                |              |
    +---------------------------------------+--------------------------------+--------------+
-   | :meth:`assertNotRegex(s, re)          | ``not regex.search(s)``        | 3.2          |
+   | :meth:`assertNotRegex(s, r)           | ``not r.search(s)``            | 3.2          |
    | <TestCase.assertNotRegex>`            |                                |              |
    +---------------------------------------+--------------------------------+--------------+
    | :meth:`assertCountEqual(a, b)         | *a* and *b* have the same      | 3.2          |