updade from Atlas repo

17-it-generator/tree/step1/test_tree.py

@@ -5,7 +5,7 @@ def test_1_level():
     class One: pass
     expected = [('One', 0)]
     result = list(tree(One))
-    assert expected == result 
+    assert expected == result
 
 
 def test_2_levels_2_leaves():
@@ -18,4 +18,4 @@ def test_2_levels_2_leaves():
             ('Leaf2', 1),
     ]
     result = list(tree(Branch))
-    assert expected == result 
+    assert expected == result