Use indentation instead of for code

README.md

@@ -77,13 +77,11 @@ If you want to add a comment to the file, make sure the line starts with a `#` a
 
 Consider the following example:
 
-```
-Capital_letters = [A-Z]
-Numbers = [0-9]
+    Capital_letters = [A-Z]
+    Numbers = [0-9]
 
-# This is a comment
-All_letters = [a-zA-Z]
-```
+    # This is a comment
+    All_letters = [a-zA-Z]
 
 Here we have 3 different tokens `Capital_letters`, `Numbers` and `All_letters`. 
 Note that the names for the tokens only consist of capital letters, small letter and underscores, other characters are not accepted.