It would be nice if the Sage Developer's Guide include a section on pyflakes, since it is a very useful developer tool.

(Perhaps it might be a good idea to include a section on useful developer tools.)

Depends on #30361

CC: @nthiery @tobiasdiez @mkoeppe

Component: documentation

Keywords: days64, developer's guide

Issue created by migration from https://trac.sagemath.org/ticket/17992