From ff5a7c80a429e89fa9c8294d3998363a4c2599fb Mon Sep 17 00:00:00 2001
From: Brandon Keepers <bkeepers@github.com>
Date: Sun, 11 Jun 2017 20:01:43 -0700
Subject: [PATCH] Fix lint errors

---
 lib/robot.js | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/lib/robot.js b/lib/robot.js
index 9d2543b5..6953820a 100644
--- a/lib/robot.js
+++ b/lib/robot.js
@@ -45,8 +45,8 @@ class Robot {
    * });
    */
   on(event, callback) {
-    if(callback.length === 2) {
-      const caller = (new Error).stack.split("\n")[2];
+    if (callback.length === 2) {
+      const caller = (new Error()).stack.split('\n')[2];
       console.warn('DEPRECATED: Event callbacks now only take a single `context` argument.', caller);
     }