commit 08b640f5727d76dbda1233c182b43a670849a0fa
author Miss Islington (bot) <31488909+miss-islington@users.noreply.github.com> Thu Apr 16 19:06:11 2020 -0700
committer GitHub <noreply@github.com> Thu Apr 16 19:06:11 2020 -0700
tree 36c049b271cebe71e5680798cd0c4b3b502d6ccf
parent ccf30e96d4bdcf04396e00899a0319041144509f

Fix parameter names in assertIn() docs (GH-18829)


The names "member" and "container" for the arguments are also used in the module and shown with the help() function, and are immediately understandable in this context, contrary to "first" and "second".
(cherry picked from commit a388bbd3f129364c39843f63e92f08bc53c71905)

Co-authored-by: Christoph Zwerschke <cito@online.de>

Doc/library/unittest.rst

diff --git a/Doc/library/unittest.rst b/Doc/library/unittest.rst
index a559d09..d9f080a 100644
--- a/Doc/library/unittest.rst
+++ b/Doc/library/unittest.rst
@@ -910,10 +910,10 @@
       .. versionadded:: 3.1
 
 
-   .. method:: assertIn(first, second, msg=None)
-               assertNotIn(first, second, msg=None)
+   .. method:: assertIn(member, container, msg=None)
+               assertNotIn(member, container, msg=None)
 
-      Test that *first* is (or is not) in *second*.
+      Test that *member* is (or is not) in *container*.
 
       .. versionadded:: 3.1