Codacy style changes for test files

test/gcd/gcd.js

@@ -2,5 +2,4 @@ const gcd = (...arr) => {
   const _gcd = (x, y) => (!y ? x : gcd(y, x % y));
   return [...arr].reduce((a, b) => _gcd(a, b));
 };
-
-module.exports = gcd;
+module.exports = gcd;