message: mandatory rustfmt code style
diff: @@ -2,7 +2,7 @@ language: rust
  cache: cargo
  matrix:
  include:
  - - rust: nightly
  + - rust: stable
  os: linux
  env: CHECK_RUSTFMT="true"
  - rust: stable
  @@ -24,9 +24,6 @@ matrix:
  - rust: stable
  os: windows
  env: CARDANO_C="false" CARDANO_WASM="false" RUN_TEST="true"
  - - rust: nightly
  - os: linux
  - env: CHECK_RUSTFMT="true"
  before_script:
  - |
  @@ -40,7 +37,7 @@ before_script:
  script:
  - |
  if [ "${CHECK_RUSTFMT}" = "true" ]; then
  - cargo fmt --package=protocol-tokio --package=protocol --package=storage-units --package=cardano-storage -- --check
  + cargo fmt -- --check
  fi
  - if [ "${RUN_TEST}" = "true" ]; then cargo build --verbose --all && cargo test --verbose --all; fi
  - if [ "${CARDANO_C}" = "true" ]; then ./cardano-c/test.sh; fi
  