[pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

Author: pre-commit-ci[bot]

data_structures/trie/radix_tree.py

@@ -218,11 +218,11 @@ def test_trie(self) -> None:
         assert root.find("bananas")
 
     def test_trie_2(self) -> None:
-        '''
+        """
         now add a new test case which inserts
         foobbb, fooaaa, foo in the given order and checks
         for different assertions
-        '''
+        """
         words = "foobbb fooaaa foo".split()
         root = RadixNode()
         root.insert_many(words)