Adopt symmetric names for arguments (actual/expected --> first/second).
diff --git a/Doc/library/unittest.rst b/Doc/library/unittest.rst
index 9e30908..609789f 100644
--- a/Doc/library/unittest.rst
+++ b/Doc/library/unittest.rst
@@ -1151,16 +1151,16 @@
.. deprecated:: 3.2
- .. method:: assertCountEqual(actual, expected, msg=None)
+ .. method:: assertCountEqual(first, second, msg=None)
- Test that sequence *actual* contains the same elements as *expected*,
+ Test that sequence *first* contains the same elements as *second*,
regardless of their order. When they don't, an error message listing the
differences between the sequences will be generated.
- Duplicate elements are *not* ignored when comparing *actual* and
- *expected*. It verifies if each element has the same count in both
+ Duplicate elements are *not* ignored when comparing *first* and
+ *second*. It verifies whether each element has the same count in both
sequences. Equivalent to:
- ``assertEqual(Counter(list(actual)), Counter(list(expected)))``
+ ``assertEqual(Counter(list(first)), Counter(list(second)))``
but works with sequences of unhashable objects as well.
.. versionadded:: 3.2