BAck in sage 9.1 we had issues with building pdf docs because of missing raw strings.
Some issues that were also happening in vanilla sage have been fixed and merged but sage-on-gentoo continued to carry a few extra ones.
This ticket is to merge those leftovers.
Component: documentation
Keywords: sd111
Author: François Bissey
Branch/Commit: 27aee93
Reviewer: Frédéric Chapoton
Issue created by migration from https://trac.sagemath.org/ticket/31032