07662aafe3
This PR improves the case splitting strategy used in `grind`, and
ensures `grind` also considers simple `match`-conditions for
case-splitting. Example:
```lean
example (x y : Nat)
: 0 < match x, y with
| 0, 0 => 1
| _, _ => x + y := by -- x or y must be greater than 0
grind
```
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| bench | ||
| compiler | ||
| elabissues | ||
| ir | ||
| lean | ||
| pkg | ||
| playground | ||
| plugin | ||
| simpperf | ||
| .gitignore | ||
| common.sh | ||
| lakefile.toml | ||
| lean-toolchain | ||