46896a7512
Conflicts with #294 in render.rs and project.rs resolved as tested: #250's side of every hunk (levelled GroupEnd { level }, groups()/group_of, axis_frame's carried headers, the try_from level check), then #294's shape (Item { tuple, .. }, FrameEntry::item(..), the DataItem { tuple, collapsed } arm, and GroupEnd { .. } in folds). Evidence EOF appends keep both sides.