Update readme code

README.md

@@ -12,8 +12,12 @@ To be able to run this benchmark test, aside from __python3.6__, two packages ar
 2. ortools
 
 These packages can easily be installed with the commands:  
+```
 pip3 install numpy
+```
+```
 pip3 install ortools
+```
 
 ### Execution
 After installing necessary packages, the benchmark test could be executed using