Update sum_of_subsets.py

Author: MaximSmolskiy

backtracking/sum_of_subsets.py

@@ -47,11 +47,16 @@ def create_state_space_tree(
     >>> path = []
     >>> result = []
     >>> create_state_space_tree(
-    ...     nums=[1], max_sum=1, num_index=0, path=path, result=result, remaining_nums_sum=1)
+    ...     nums=[1], 
+    ...     max_sum=1,
+    ...     num_index=0,
+    ...     path=path,
+    ...     result=result,
+    ...     remaining_nums_sum=1)
     >>> path
     []
     >>> result
-    []
+    [[1]]
     """
 
     if sum(path) > max_sum or (remaining_nums_sum + sum(path)) < max_sum: