macros.md gains section 12.17; macros-wram.md section 9 gains the frame-by-frame trace of a step,
the three readings that come out of it and the one byte that tracks a step exactly and is recorded
unused; macros-traps.md closes rows 54 and 54b, strikes the two residuals they worked, and prints
both checkpoints' before and after whole -- including the arm where the ethos check's "fewer
flagged windows, more distinct tiles" does not hold, and why.
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