Merge branch 'ks/branch-list-detached-rebase-i'

"git branch --list" during an interrupted "rebase -i" now lets users distinguish the case where a detached HEAD is being rebased and a normal branch is being rebased. * ks/branch-list-detached-rebase-i: t3200: verify "branch --list" sanity when rebasing from detached HEAD branch --list: print useful info whilst interactive rebasing a detached HEAD