Resolved

updated in this fork

Approved

python new test framework is required. updated in this fork

Unpublishing as a kata very similar to other substitution cipher tasks, including a couple of atbash kata (like Atbash Cipher Helper).

Java translation

Description is inaccurate: "an extra line feed character is needed at the end of the string." should be "a line feed character is needed at the end of the string."
Because there are never two line feed characters at the end of a string.

Updated to Node v12

JS: Node v12 should be used along with its appropiate assertion tools (Mocha + Chai).
Refer to this and this

Make sure the string ends with a newline.

Ruby 3.0 should be enabled.

Actually i post this to that list due to the doc's cmt below and it definitely looked like ceasar cipher at first sight (Will found one when i had time) ~~

I am not going to unpublish this one as a duplicate of Caesar cipher kata, because it's not Caesar cipher. However, I am pretty sure there is a kata based on this form of "encryption". I cannot find it now though. If anybody finds the original kata, post a link here and I will unpublish this one.

After testing it shows expected result totally similar as an actual but still don't accept it, does somebody knows where can be the problem?

Description was updated in the meantime