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

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

tests/test_hash_trie_map.py

@@ -26,6 +26,7 @@
     FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
     OTHER DEALINGS IN THE SOFTWARE.
 """
+
 from collections import abc
 from operator import methodcaller
 import pickle

tests/test_hash_trie_set.py

@@ -26,6 +26,7 @@
     FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
     OTHER DEALINGS IN THE SOFTWARE.
 """
+
 from collections import abc
 import pickle
 

tests/test_list.py

@@ -26,6 +26,7 @@
     FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
     OTHER DEALINGS IN THE SOFTWARE.
 """
+
 import pickle
 
 import pytest

tests/test_queue.py

@@ -26,6 +26,7 @@
     FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
     OTHER DEALINGS IN THE SOFTWARE.
 """
+
 import pytest
 
 from rpds import Queue