sage

da8e1ab6 -

gh-36906: various fixes in quadratic_forms (ruff, pep8, error links, etc) this is fixing various minor details in `quadratic forms` ### :memo: Checklist - [x] The title is concise, informative, and self-explanatory. - [x] The description explains in detail what this PR is about. URL: https://github.com/sagemath/sage/pull/36906 Reported by: Frédéric Chapoton Reviewer(s): David Coudert