MarsSeed [1] filed a deletion request for python2-svnplot [2]: Orphaned Python 2 package, last updated in 2015. Its BitBucket repo has been deleted (404). Not needed by anything. Safe to delete.
[1] https://aur.archlinux.org/account/MarsSeed/ [2] https://aur.archlinux.org/pkgbase/python2-svnplot/
