sage

4dd66116 - gh-37772: add links to standard errors in toric folder

gh-37772: add links to standard errors in toric folder adding links to standard python errors in the doc inside the `schemes/toric` folder plus a few pep8 cleanups ### :memo: Checklist - [x] The title is concise and informative. - [x] The description explains in detail what this PR is about. URL: https://github.com/sagemath/sage/pull/37772 Reported by: Frédéric Chapoton Reviewer(s): Matthias Köppe