style: format code

frontend/src/pages/wiki2/custom-icon.js

@@ -0,0 +1,14 @@
+import React from 'react';
+import ProtoTypes from 'prop-types';
+
+const CustomIcon = ({ icon }) => {
+  return (
+    <span className='nav-item-icon nav-item-icon-disable'>{icon}</span>
+  );
+};
+
+CustomIcon.propTypes = {
+  icon: ProtoTypes.string.isRequired,
+};
+
+export default CustomIcon;