giles 8a9168c8d5 haskell: n-queens via list comprehension + where (+2 tests, 397/397) ...

- fix hk-eval-let: multi-clause where/let now uses hk-bind-decls!
  grouping (enables go 0 / go k pattern)
- add concatMap/concat/abs/negate to Prelude (list comprehension support)
- cache init env in hk-env0 (eval-expr-source 5x faster)

2026-04-25 18:40:27 +00:00

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