Reports

Swift 5. user187676's excellent solution can be extended to make a more general trimming method.

// Drop any character contained in the set characters from the end of self. 
// Defaults to trimming spaces, CR, LF
extension String {
   func trimTrailing(_ characters: String = " \r\n") -> String {
      String(reversed().drop {characters.contains($0)}.reversed())
   }
}

and can be used like this:

let valueTrimmed = value.trimTrailing() // Default character set
let valueTrimmed = value.trimTrailing("@\0\u{FF}") // Custom character set

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