use nightly fmt

.github/workflows/rust.yml

@@ -20,13 +20,13 @@ jobs:
           - nightly
     steps:
       - uses: actions/checkout@v2
-
       - uses: actions-rs/toolchain@v1
         with:
           profile: minimal
           toolchain: ${{ matrix.rust }}
           override: true
-          components: clippy
+          components: rustfmt, clippy
+
       - uses: actions-rs/cargo@v1
         with:
           command: build
@@ -36,17 +36,11 @@ jobs:
           command: test
           args: --features all --verbose
       - uses: actions-rs/cargo@v1
-        with:
-          command: clippy
-          args: --features all -- -D warnings
-
-      - uses: actions-rs/toolchain@v1
-        with:
-          profile: minimal
-          toolchain: stable
-          override: true
-          components: rustfmt
-      - uses: actions-rs/cargo@v1
+        if: ${{ matrix.rust == 'nightly' }}
         with:
           command: fmt
           args: --verbose --all -- --check
+      - uses: actions-rs/cargo@v1
+        with:
+          command: clippy
+          args: --features all -- -D warnings