Fix pre-commit formatting issues: add missing newline and remove trailing whitespace

Co-authored-by: commjoen <[email protected]>

Author: Copilot

.github/scripts/setup-precommit.sh

@@ -29,4 +29,4 @@ echo "  pre-commit run <hook-name>     # Run specific hook"
 echo "  pre-commit autoupdate          # Update hook versions"
 echo ""
 echo "💡 Pre-commit will now run automatically on every commit!"
-echo "   To bypass pre-commit checks (not recommended): git commit --no-verify"
+echo "   To bypass pre-commit checks (not recommended): git commit --no-verify"

CONTRIBUTING.md

@@ -140,7 +140,7 @@ pre-commit run
 
 #### Common Issues & Fixes
 - **Trailing whitespace**: Automatically fixed by pre-commit
-- **Missing newlines**: Automatically fixed by pre-commit  
+- **Missing newlines**: Automatically fixed by pre-commit
 - **Java formatting**: Run `./mvnw spotless:apply`
 - **Commit message format**: Follow [Conventional Commits](https://www.conventionalcommits.org/)