sage

3095f518 - Trac #34952: sage.graphs: Replace imports from sage.*.all for namespace packages

Trac #34952: sage.graphs: Replace imports from sage.*.all for namespace packages Using `./sage -fiximports` from #34945. Also remove trailing whitespace in the affected files. Part of Meta-ticket #32414 URL: https://trac.sagemath.org/34952 Reported by: mkoeppe Ticket author(s): Alex Chandler Reviewer(s): David Coudert