Merge branch 'ak/rebase-autosquash'

"git rebase --autosquash" is now enabled for non-interactive rebase, but it is still incompatible with the apply backend. * ak/rebase-autosquash: rebase: rewrite --(no-)autosquash documentation rebase: support --autosquash without -i rebase: fully ignore rebase.autoSquash without -i