Fixed README problem

Author: kjessup

README.md

@@ -20,7 +20,9 @@ import PerfectHTTPServer
 
 You will also need to adjust your Package.swift file. You should only need to change the Perfect dependency to the following:
 
-```https://github.com/PerfectlySoft/Perfect-HTTPServer.git```
+```
+https://github.com/PerfectlySoft/Perfect-HTTPServer.git
+```
 
 --