Description should be language-agnostic

Done.

I know its been 5 years, but personally I would find counting the negative cases more funny optimization wise,
I do not see why outside of that though that negative coins are necessary

Author is gone. I add both informations in the description.

does not specify wether the sorting can/should mutate the input array (like the builtins in Python and JS) or return a new instance

JavaScript update

updated Node version to 14, and fixed reference and example solutions which used incorrect logic for comparisons.

( Depending on your language ) It still is.

approved

COBOL translation.

Since this is not testing a real email address, the description could've clarified it better.

The local part, however, also allows a lot of different special characters.

And what are those special characters? Any characters?

Given a valid email address

What is a valid email address? at least in this kata.

fixed

Approved

• Node 12 should be enabled

• assert.strictEqual should be used

Ruby 3.0 should be enabled, see this to learn how to do it

Please organize the structure of test fixture as following (although it has been mentioned in the attached link, I'm repeated here again)

describe "<This message should describe the categories of test groups inside this block>" do
  it "<A short message describing this test group>" do
    expect(...).to eq(...) #Assertions
    #Or Test.assert_equals(user_response, reference_response)
  end
end