Show diffs generated by clang-format

.github/workflows/format.yml

@@ -14,13 +14,9 @@ jobs:
       run: |
         find LEGO1 ISLE -iname '*.h' -o -iname '*.cpp' | xargs \
         pipx run "clang-format>=17,<18" \
-          ${{ github.event_name == 'push' && '--Werror --dry-run' || '' }} \
           --style=file \
           -i
-    - uses: stefanzweifel/git-auto-commit-action@latest
-      if: ${{ github.event_name == 'pull_request' }}
-      with:
-        commit_message: clang-format fixes
+        git diff --exit-code
 
   python-format:
     name: 'Python'