Update util.py

Author: nhumrich

pathspec/util.py

@@ -49,7 +49,7 @@ def iter_tree(root):
 			abspath = os.path.abspath(parent)
 			if real != abspath and real in abspath:
 				# if real is a parent of current parent
-				raise util.RecursionError(real_path=real, first_path=memo[real], second_path=parent)
+				raise RecursionError(real_path=real, first_path=memo[real], second_path=parent)
 			else:
 				# not recursion, just a sideways link
 				continue