Update README.md

@@ -4,12 +4,13 @@ cores of the machine. You need to specify the number of concurrent threads, and
 optionally the priority of the process by specifying a nice value to add.
 
 ## Syntax
+```
 piloop <n> <p>
 
 Where
 <n> The number of concurrent threads to run
 <p> The priority of the process (added to the default nice value of 0)
-
+```
 On most systems root privileges are needed to change the process nice value.
 
 Set number of threads to the same number as logical cpus in order to load all