String::trim_right

Remove whitespace at the end of this string.

" foo ".trim_right() //-> " foo"

Source Codepublic method trim_right(this: String, ): String {
  let i = this.len() - 1
  while i >= 0 {
    let char = this.substring(i, i + 1)
    if char != " " {
      break
    }

    i -= 1
  }

  this.substring(0, i + 1)
}