ci: restore rust-toolchain file after checking formatting with rustfmt

Author: matthiaskrgr

.github/workflows/clippy_dev.yml

@@ -25,6 +25,26 @@ jobs:
       - name: Checkout
         uses: actions/[email protected]
 
+      # To test formatting, we need to temporarily disable the rust-toolchain file
+      - name: remove toolchain file
+        run: rm rust-toolchain
+
+      - name: rust-toolchain
+        uses: actions-rs/[email protected]
+        with:
+          toolchain: nightly
+          target: x86_64-unknown-linux-gnu
+          profile: minimal
+          components: rustfmt
+          default: true
+
+      - name: Test fmt
+        run: cargo dev fmt --check
+
+      # Restore the rust-toolchain-file
+      - name: Restore rust-toolchain-file
+        run: git checkout rust-toolchain
+
       # Run
       - name: Build
         run: cargo build --features deny-warnings
@@ -36,9 +56,6 @@ jobs:
       - name: Test update_lints
         run: cargo dev update_lints --check
 
-      - name: Test fmt
-        run: cargo dev fmt --check
-
       # Lintcheck
       - name: build lintcheck
         run: cargo build --features lintcheck,deny-warnings