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[fixer-selftest] Fix typo in euf_ac_plugin.cpp comment: "betwen" → "between" (#10141)

## Automated workflow self-test

This PR is an **automated workflow self-test** of the `fixer-selftest` /
`snapshot-regression-fixer` pipeline running on the self-hosted
`rise-runner-1` pool. Its purpose is to verify that Copilot inference
runs and that the `create-pull-request` safe output can open a real
**draft** pull request on `Z3Prover/z3`.

### The fix

- **File:** `src/ast/euf/euf_ac_plugin.cpp` (line 995)
- **Before:** `// add difference betwen dst.l and src.l to both src.l,
src.r`
- **After:** `// add difference between dst.l and src.l to both src.l,
src.r`

A single spelling mistake (`betwen` → `between`) in a `//` code comment.

### Why no rebuild is needed

The change is **comment-only** — no code, string literals, identifiers,
or build files were touched — so it cannot affect z3's behaviour and
requires no compilation or testing.

### For maintainers

This is a genuine, correct fix, so feel free to **merge** it. Equally,
you may simply **close** it — the success of the self-test does not
depend on this PR being merged.




> Generated by [Self-test the agentic PR pipeline with a tiny z3 comment
fix](https://github.com/Z3Prover/bench/actions/runs/29523479037) · 54.5
AIC · ⌖ 18.9 AIC · ⊞ 8K ·
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z3prover-ci-bot[bot] 2026-07-16 11:33:30 -07:00 committed by GitHub
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@ -992,7 +992,7 @@ namespace euf {
SASSERT(is_correct_ref_count(monomial(src.r), m_src_r_counts));
SASSERT(is_correct_ref_count(monomial(dst.l), m_dst_l_counts));
SASSERT(is_correct_ref_count(monomial(dst.r), m_dst_r_counts));
// add difference betwen dst.l and src.l to both src.l, src.r
// add difference between dst.l and src.l to both src.l, src.r
for (auto n : monomial(dst.l)) {
unsigned id = n->id();
SASSERT(m_dst_l_counts[id] >= m_src_l_counts[id]);