[Typescript] 69. Medium - Trim Right

Implement TrimRight<T> which takes an exact string type and returns a new string with the whitespace ending removed.

For example:

type Trimed = TrimRight<'   Hello World    '> // expected to be '   Hello World'

/* _____________ Your Code Here _____________ */
type Space = ' ' | '\n\t';
type TrimRight<S extends string> = S extends `${infer Left}${Space}` 
  ? TrimRight<Left>
  : S;
  
/* _____________ Test Cases _____________ */
import type { Equal, Expect } from '@type-challenges/utils'

type cases = [
  Expect<Equal<TrimRight<'str'>, 'str'>>,
  Expect<Equal<TrimRight<'str  '>, 'str'>>,
  Expect<Equal<TrimRight<'str     '>, 'str'>>,
  Expect<Equal<TrimRight<'     str     '>, '     str'>>,
  Expect<Equal<TrimRight<'   foo bar  \n\t '>, '   foo bar'>>,
  Expect<Equal<TrimRight<''>, ''>>,
  Expect<Equal<TrimRight<'\n\t '>, ''>>,
]