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

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

tests/test_text.py

@@ -37,5 +37,5 @@ def test_api():
     assert len(text) == 0
     text[:] = hello + world + punct
     assert str(text) == hello + world + punct
-    text[len(hello):len(hello) + len(world)] = " Sir"
+    text[len(hello) : len(hello) + len(world)] = " Sir"
     assert str(text) == hello + " Sir" + punct