Lean 4 fork for HoTT-compatible kernel extensions (Path types, transport, HITs). Maintained against upstream leanprover/lean4.
4b7ea26d91
This PR adds a `grind` normalization theorem for `Int.negSucc`. Example:
```lean
example (p : Int) (n : Nat) (hmp : Int.negSucc (n + 1) + 1 = p)
(hnm : Int.negSucc (n + 1 + 1) + 1 = Int.negSucc (n + 1)) : p = Int.negSucc n := by
grind
```
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