WIKI tickets: StrictMark markup & wiki rendering

WIKI collects work on the StrictMark markup and its renderer/linter (beagle/mark, driving the MKDT grammar in dog/tok) — the engine behind every WikiWeb page. A landed ticket (verify with be log | grep WIKI-NNN) drops off. The fix-and-land method is Issues.

Active tickets

(none — WIKI-001 landed d36afdc9)