Extend the write-verb alternation with mv/install/printf/dd/scp/rsync/ln,
allow short option clusters between verb and path, and add a bare-leading-
redirect branch (a > ~/.ssh/... line carries no verb word at all). Prose
that names a write primitive before an SSH path still fails closed — a
false positive costs a review, a false negative is a backdoor.
(cherry picked from commit 4865b96ca3c8661c0ea6f5c479c198ccf68f86c4)
fe68349cd6