fixed readme

README.md

@@ -131,12 +131,14 @@ in the same directory. (Note: it is important that you run the executables in th
 
 For Linux you need to first install the packages
 
-> sudo apt install libsdl2-dev
-> sudo apt install libsdl2-image-dev
-> sudo apt install libsdl2-ttf-dev
-> sudo apt install libfreetype6-dev
-> sudo apt install libtiff-dev
-> sudo apt install libbz2-dev
+```bash
+sudo apt install libsdl2-dev
+sudo apt install libsdl2-image-dev
+sudo apt install libsdl2-ttf-dev
+sudo apt install libfreetype6-dev
+sudo apt install libtiff-dev
+sudo apt install libbz2-dev
+```
 
 To make it slightly easier to build both the examples and the assigment itself a Makefile is provided: