<div id="comment:0"></div> mostly a few pep8 changes CC: @tscrim @kwankyu @kliem @slel Component: **group theory** Author: **Frédéric Chapoton** Branch/Commit: **[`16fd967`](https://github.com/sagemath/sagetrac-mirror/commit/16fd967e51813ef97c7f9da6eee35ade6c5857de)** Reviewer: **Travis Scrimshaw** _Issue created by migration from https://trac.sagemath.org/ticket/34647_