[The information in titles, especially long titles that do not fit in the title box (on my system, at least) should be repeated in the opening message.] The point of the patch is to use the same name for the same object in the two columns* and to use a single letter to be consistent with the rest of the table. I think the patch should be applied. * Using 're' and 'regex' to mean the same object *is* confusing.
Fixed, thanks for the report and the patch! I also updated the table entry for assertRaisesRegex and assertWarnsRegex. I avoid using "regex" instead of "re" or "r" to keep it short and avoid confusion with the re/regex modules. The documentation of the methods uses "regex", but there it's OK.