Codacy style changes for test files

test/once/once.js

@@ -1,9 +1,10 @@
 const once = fn => {
-let called = false;
-return function(...args) {
-if (called) return;
-called = true;
-return fn.apply(this, args);
-};
+  let called = false;
+  return function(...args) {
+    if (called) return;
+    called = true;
+    return fn.apply(this, args);
+  };
 };
+
 module.exports = once;