Three dc7aa709 fixes shipped without pinning tests:
- K09: R7RS longhand (unquote-splicing X) now splices (was silent zero-splice)
- K11: guard re-raise sentinel gensym'd — a user value shaped like
(list '__guard-reraise__ X) is data, not a forged re-raise
- K39: (do ((fn (x) x) 5) 99) -> 99, not a misparsed Scheme do-loop
Add suites gate-K09-longhand-unquote-splicing, gate-K11-guard-reraise-forgeable,
gate-K39-do-iife-head to spec/tests/test-gate-pins.sx with exact reprs from
plans/sx-review/core.md. 261 passed / 0 failed under OCaml run_tests.
Test-only: no semantics edits, no push.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
giles
dafd0de8f2