Merge branch 'nd/do-not-move-worktree-manually' into maint

"git worktree" had a broken code that attempted to auto-fix possible inconsistency that results from end-users moving a worktree to different places without telling Git (the original repository needs to maintain backpointers to its worktrees, but "mv" run by end-users who are not familiar with that fact will obviously not adjust them), which actually made things worse when triggered. * nd/do-not-move-worktree-manually: worktree: stop supporting moving worktrees manually worktree.c: fix indentation