Minor edits

Author: smarie

pytest_cases/decorator_hack.py

@@ -1,7 +1,5 @@
 import sys
 
-from itertools import chain
-
 from decorator import FunctionMaker
 from inspect import isgeneratorfunction
 

pytest_cases/main.py

@@ -1,3 +1,4 @@
+# Use true division operator always even in old python 2.x (used in `_get_case_getter_s`)
 from __future__ import division
 
 import sys