shorter error message

src/plugins/index.js

@@ -44,7 +44,7 @@ module.require = function () {
 		// if we can't find the module try in parent directory
 		// since plugins.js moved into plugins folder
 		if (err.code === 'MODULE_NOT_FOUND') {
-			winston.warn('[plugins/require] please update module.parent.require("' + arguments[0] + '") in your plugin!\n' + err.stack.split('\n').slice(0, 6).join('\n'));
+			winston.warn('[plugins/require] please update module.parent.require("' + arguments[0] + '") in your plugin!\n' + err.stack.split('\n')[5]);
 			return defaultRequire.apply(module, [path.join('../', arguments[0])]);
 		}
 		throw err;