Changed the typographical error (TheAlgorithms#132)

Changed the typo in line 113 and 115 regarding recursive binary search algorithm, found by a user who commented in comments.

Author: nandujkishor

searches/binary_search.py

@@ -113,7 +113,7 @@ def binary_search_by_recursion(sorted_collection, item, left, right):
         return binary_search_by_recursion(sorted_collection, item, left, midpoint-1)
     else:
         return binary_search_by_recursion(sorted_collection, item, midpoint+1, right)
-
+      
 def __assert_sorted(collection):
     """Check if collection is sorted, if not - raises :py:class:`ValueError`