Correctly generate multiple CLI arguments for Haskell

[JeroenUH]

There was a bug with the Haskell judge where the list that contains the command line arguments was not correctly compiled into Haskell, due to a missing comma in the generated output.

Example Testcase

- tab: "command_line_arguments"
  testcases:
  - arguments: ["banana", "apple", "apple", "orange", "apple", "apple", "banana", "orange"]
    stdout: "apple banana orange"

The following line is responsible for converting it to Haskell:

universal-judge/tested/languages/haskell/generators.py

Line 244 in 3b65304

result += indent + f"let mainArgs = [{' '.join(wrapped)}]\n"

However, this generates something like this:

let mainArgs = ["banana" "apple" "apple" "orange" "apple" "apple" "banana" "orange"]

This causes an error like this:

Execution0.hs:64:21: error: [GHC-83865]
    • Couldn't match expected type: String
                                    -> String -> String -> String -> String -> String -> String -> a
                  with actual type: [Char]
    • The function ‘"banana"’ is applied to 7 value arguments,
        but its type ‘[Char]’ has none
      In the expression:
        "banana" "apple" "apple" "orange" "apple" "apple" "banana" "orange"
      In the expression:
        ["banana"
           "apple" "apple" "orange" "apple" "apple" "banana" "orange"]

In Haskell, arrays are comma separated. This PR adds the commas, as well as a test-case for it.

[niknetniko]

You'll need to run the formatter, but otherwise changes look good to me.

[jorg-vr]

Thanks for your contribution!