`_ROW`'s `[^|]*` Blocks cell means a raw pipe inside it — a code span such as
`grep ... | cut ...` — stops the row matching. An unmatched row is an ABSENT row, which the set
equality reports as a guard job with no entry, so the failure is a loud red rather than a
silently skipped row.
Measured rather than reasoned: injecting a pipe into one Blocks cell reddens
test_the_inventory_covers_exactly_the_guard_JOBS_that_exist naming that job. Recorded because a
regex over a Markdown table invites the opposite assumption, and the next person to widen a cell
should know which way it breaks.
Refs #786
timothy
2cc97743c0