Codacy style changes for test files

test/gcd/gcd.js

@@ -1,5 +1,6 @@
 const gcd = (...arr) => {
-const _gcd = (x, y) => (!y ? x : gcd(y, x % y));
-return [...arr].reduce((a, b) => _gcd(a, b));
+  const _gcd = (x, y) => (!y ? x : gcd(y, x % y));
+  return [...arr].reduce((a, b) => _gcd(a, b));
 };
+
 module.exports = gcd;