I just saw this when doctesting:

/Users/jpalmier/Desktop/Sage/git/sage/src/sage/functions/special.py:852: DeprecationWarning: invalid escape sequence '\p'

To reproduce: assuming you have an editable build, run touch src/sage/functions/special.py and then doctest a file.

Component: documentation

Author: John Palmieri

Branch/Commit: 0497131

Reviewer: Dima Pasechnik

Issue created by migration from https://trac.sagemath.org/ticket/34465