Codacy style changes for test files

test/symmetricDifference/symmetricDifference.js

@@ -3,5 +3,4 @@ const symmetricDifference = (a, b) => {
     sB = new Set(b);
   return [...a.filter(x => !sB.has(x)), ...b.filter(x => !sA.has(x))];
 };
-
-module.exports = symmetricDifference;
+module.exports = symmetricDifference;