shape-doctor.py: a NEXT is only the command, and the sentence that ended twenty-five of them after # is the row's why, on a WHY line of its own and "why" in --json, so a NEXT pasted into an interactive zsh -- which reads that # as a word -- no longer hands the comment to the command as arguments, runs what follows its ;, or runs the make bootstrap in its backticks, and the template validator's line is env PYTHONPATH=... python3 ... (#277) - #402