cicd: show diff on failure for formatting

.github/workflows/pre-commit.yaml

@@ -25,10 +25,4 @@ jobs:
         run: pip install pre-commit
 
       - name: Run pre-commit
-        run: pre-commit run --all-files || true
-
-      - name: Check for formatting issues
-        if: failure()
-        run: |
-          echo "The following files do not meet clang-format standards:"
-          git diff --name-only --diff-filter=M
+        run: pre-commit run --all-files --show-diff-on-failure