A couple optimizations are warranted:

• Remove the last 2 lines of the code block in the description and add to the plain text description
• You can implement the random string generator as (repeatedly len #(rand-nth "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"), or something similar with rand-nth

Good point. This now uses a list of candidate names to generate an input list of up to 100 names. Thank you!

Type issue in the test suite?

test/CalculateParityBitSpec.hs:18:105: error:
• Couldn't match expected type ‘Int’ with actual type ‘Word’
• In the third argument of ‘assertEqual’, namely
‘(checkParity parity string)’
In a stmt of a 'do' block:
assertEqual
("checkParity " <> show parity <> " " <> show string)
(refCheckParity parity string) (checkParity parity string)
In the expression:
do assertEqual
("checkParity " <> show parity <> " " <> show string)
(refCheckParity parity string) (checkParity parity string)
|
18 | assertEqual ("checkParity " <> show parity <> " " <> show string) (refCheckParity parity string) (checkParity parity string)
|
^^^^^^^^^^^^^^^^^^^^^^^^^

The Scala function should return List[String], not List[String, String]