improve code formatting

Author: bbodenmiller

README.md

@@ -103,11 +103,11 @@ replace** the indicated address by **your** address.
      Check that the socket is properly created and is listening. This
      can be done with `netstat`, like this for UNIX sockets:
 
-         netstat --unix -l
+     `netstat --unix -l`
 
       or like this for TCP sockets:    
 
-         netstat -t -l
+     `netstat -t -l`
 
       It should display the PHP CGI socket.