Update README.md

README.md

@@ -7,7 +7,7 @@ The data are accessed via the  [rdrand instruction](https://software.intel.com/c
 
 ## Source
 
-**random_hw.c:**  hardware generated random data. 
+**random_hw.c:**  hardware generated random data.   
 **random_pcg.c:** PCG pseudorandom data. The seed is left intentionally uninitialized.
 
 ## Build