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

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

Author: pre-commit-ci[bot]

strings/split.py

@@ -27,14 +27,15 @@ def split(string: str, separator: str = " ") -> list:
             split_words.append(string[last_index:index])
             last_index = index + 1
         elif index + 1 == len(string):
-            split_words.append(string[last_index:index + 1])
+            split_words.append(string[last_index : index + 1])
 
     if string and string[-1] == separator:
-        split_words.append('')
+        split_words.append("")
 
     return split_words
 
 
 if __name__ == "__main__":
     from doctest import testmod
-    testmod()
+
+    testmod()