Tighten up psf/black and flake8 (#2024)

* Tighten up psf/black and flake8

* Fix some tests

* Fix some E741

* Fix some E741

* updating DIRECTORY.md

Co-authored-by: github-actions <${GITHUB_ACTOR}@users.noreply.github.com>

strings/split.py

@@ -1,16 +1,16 @@
 def split(string: str, separator: str = " ") -> list:
     """
     Will split the string up into all the values separated by the separator (defaults to spaces)
-    
+
     >>> split("apple#banana#cherry#orange",separator='#')
     ['apple', 'banana', 'cherry', 'orange']
-    
+
     >>> split("Hello there")
     ['Hello', 'there']
-    
+
     >>> split("11/22/63",separator = '/')
     ['11', '22', '63']
-    
+
     >>> split("12:43:39",separator = ":")
     ['12', '43', '39']
     """