Make some ruff fixes (#8154)

* Make some ruff fixes

* Undo manual fix

* Undo manual fix

* Updates from ruff=0.0.251

data_structures/binary_tree/binary_search_tree.py

@@ -60,7 +60,7 @@ class BinarySearchTree:
         else:  # Tree is not empty
             parent_node = self.root  # from root
             if parent_node is None:
-                return None
+                return
             while True:  # While we don't get to a leaf
                 if value < parent_node.value:  # We go left
                     if parent_node.left is None:

data_structures/binary_tree/binary_tree_traversals.py

@@ -37,7 +37,7 @@ def preorder(root: Node | None) -> list[int]:
     >>> preorder(make_tree())
     [1, 2, 4, 5, 3]
     """
-    return [root.data] + preorder(root.left) + preorder(root.right) if root else []
+    return [root.data, *preorder(root.left), *preorder(root.right)] if root else []
 
 
 def postorder(root: Node | None) -> list[int]:
@@ -55,7 +55,7 @@ def inorder(root: Node | None) -> list[int]:
     >>> inorder(make_tree())
     [4, 2, 5, 1, 3]
     """
-    return inorder(root.left) + [root.data] + inorder(root.right) if root else []
+    return [*inorder(root.left), root.data, *inorder(root.right)] if root else []
 
 
 def height(root: Node | None) -> int:

data_structures/binary_tree/inorder_tree_traversal_2022.py

@@ -50,7 +50,7 @@ def inorder(node: None | BinaryTreeNode) -> list[int]:  # if node is None,return
     """
     if node:
         inorder_array = inorder(node.left_child)
-        inorder_array = inorder_array + [node.data]
+        inorder_array = [*inorder_array, node.data]
         inorder_array = inorder_array + inorder(node.right_child)
     else:
         inorder_array = []

data_structures/binary_tree/red_black_tree.py

@@ -319,9 +319,8 @@ class RedBlackTree:
         """A helper function to recursively check Property 4 of a
         Red-Black Tree. See check_color_properties for more info.
         """
-        if self.color == 1:
-            if color(self.left) == 1 or color(self.right) == 1:
-                return False
+        if self.color == 1 and 1 in (color(self.left), color(self.right)):
+            return False
         if self.left and not self.left.check_coloring():
             return False
         if self.right and not self.right.check_coloring():