8b1d2fc2d5
This PR adds an unexpander for `OfSemiring.toQ`. This an auxiliary
function used by the `ring` module in `grind`, but we want to reduce the
clutter in the diagnostic information produced by `grind`. Example:
```
example [CommSemiring α] [AddRightCancel α] [IsCharP α 0] (x y : α)
: x^2*y = 1 → x*y^2 = y → x + y = 2 → False := by
grind
```
produces
```
[ring] Ring `Ring.OfSemiring.Q α` ▼
[basis] Basis ▼
[_] ↑x + ↑y + -2 = 0
[_] ↑y + -1 = 0
```
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| bench | ||
| compiler | ||
| elabissues | ||
| ir | ||
| lean | ||
| pkg | ||
| playground | ||
| plugin | ||
| simpperf | ||
| .gitignore | ||
| common.sh | ||
| lakefile.toml | ||
| lean-toolchain | ||