<div id="comment:0"></div> full pep8, some other details CC: @tscrim @kwankyu @kliem @slel Component: **commutative algebra** Author: **Frédéric Chapoton** Branch/Commit: **[`105dae1`](https://github.com/sagemath/sagetrac-mirror/commit/105dae177cb01ba13622024100b54d2f1df14d76)** Reviewer: **Travis Scrimshaw** _Issue created by migration from https://trac.sagemath.org/ticket/34542_