This spaces are necessary because without them it will markdown as below:  <img width="818" alt="2016-08-31 3 56 32" src="https://cloud.githubusercontent.com/assets/6477701/18119268/cbbf8490-6f94-11e6-84e6-c9e875f00228.png">  This spaces make this pretty as below:  <img width="819" alt="2016-08-31 3 56 55" src="https://cloud.githubusercontent.com/assets/6477701/18119277/d48e0772-6f94-11e6-81ea-208533fc98e7.png"> 