message: actions: Check the code formatting
  This is done before the build step so as to fail early if poorly-
  formatted code is proposed.
diff: @@ -24,6 +24,8 @@ jobs:
  components: rustfmt
  - name: clean
  run: cargo clean
  + - name: check formatting
  + run: cargo fmt --check
  - name: build
  run: cargo build --verbose
  env:
  