Merge branch 'lennart-k-patch-1'

Author: Chris Cho

source/motor.txt

@@ -56,7 +56,7 @@ Connect to MongoDB Atlas
 
    import motor
 
-   client = client = motor.motor_tornado.MotorClient(
+   client = motor.motor_tornado.MotorClient(
       "mongodb+srv://<username>:<password>@<cluster-url>/test?retryWrites=true&w=majority")
    db = client.test