PASS: paste DOM
PASS: paste selection
PASS: undo DOM
PASS: undo selection
PASS: redo DOM
PASS: redo selection
PASS: seam paste DOM
PASS: seam paste selection
PASS: seam paste top-level text nodes
PASS: seam paste merges around its rendered start
PASS: seam paste preserves trailing protected space
PASS: seam paste inline text nodes
PASS: seam undo DOM
PASS: seam undo selection
PASS: seam redo DOM
PASS: seam redo selection
PASS: seam redo top-level text nodes
PASS: seam redo merges around its rendered start
PASS: seam redo preserves trailing protected space
PASS: seam redo inline text nodes
