check fmt

.github/workflows/rust.yml

@@ -16,7 +16,10 @@ jobs:
 
     steps:
     - uses: actions/checkout@v3
+    - name: Check format
+      run: cargo fmt --all --check
     - name: Build
       run: cargo build --all-targets --verbose
     - name: Run tests
       run: cargo test --verbose
+