Single-iteration, RED-first plan for the prose-loop-binders spec.
Task 1 pins the desired Option-A bytes in two new committed
.prose.txt fixtures + two snapshot tests (RED against the old
renderer). Task 2 rewrites the Term::Loop arm of write_term and
gates GREEN via the snapshot suite + two ail-prose CLI byte-matches
+ an exact untouched-set check. Recon-verified line anchors; planner
Step-5 self-review clean on all 8 items.
Brummel
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