edit README

Author: joel-ling

README.md

@@ -58,7 +58,6 @@ at the beginning of every internet datagram (more fondly known as a "packet").
   Note that each tick mark represents one bit position.
 ```
 
-```
 ```
     0                   1                   2                   3
     0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1