Add trailing newline to test script and CI workflow

.github/workflows/ci.yml

@@ -110,4 +110,4 @@ jobs:
           name: marlin-coverage-report-xml
           path: cobertura.xml # Default XML output name for Tarpaulin
           if-no-files-found: warn
-          retention-days: 7
+          retention-days: 7

run_all_tests.sh

@@ -464,4 +464,4 @@ main() {
 # Run main
 main
 
-# Cleanup is handled by the trap
+# Cleanup is handled by the trap