You don't need to pass anything to split: split will split on whitespace by default.

No need for double quotes. A single-quoted strings don’t process ASCII escape codes, and they don’t do string interpolation while double-quoted does both.

That is DRY ideology :)

It should be solved now; if not, let me know!

Comparison?

Expected: Bravo Alpha Bravo Bravo Lima Echo, instead got: Bravo Alpha Bravo Bravo Lima Echo

I have no trailing/leading spaces, and the code returns exactly what is expected.

Similar thing happens with this:

Test.assertSimilar(nato('cs'), 'Charlie Sierra');

Is there an issue with the Ruby version? I'm getting this error on Submit, I'm sure it is part of the test that I'm failing, but it happens even when the entire function is commented out.

#<NoMethodError: undefined method `[]' for nil:NilClass>
`block in n' `each' `n' `block (3 levels) in
' `block (2 levels) in
' `each'