Update README.md

Author: aaronchall

README.md

@@ -6,12 +6,12 @@ Dead ends in Python!
 
 Since all (builtin) sets in Python are finite, all complements of the builtin sets would be infinite. 
 
-Practically, one cannot iterate over an infinite set... so no __iter__ method. 
+Practically, one cannot iterate over an infinite set... so no `__iter__` method. 
 Unless maybe we have the complement of the complement of a finite set, but then we'd just have the set.
 
-Also, since len() must return an integer, and a len(SetComplement([])) would be infinity, 
-and you cannot represent infinity as an integer type (well, maybe you can by subclassing ints...) 
-but it's not very practical. Anyways, no __len__ method.
+Also, since `len()` must return an integer, and a `len(SetComplement([]))` would be infinity, 
+and you cannot represent infinity as an integer type (well, maybe you can by subclassing `int`...) 
+but it's not very practical. Anyways, no `__len__` method.
 
 This object is interesting theoretically, but has little practical use.