   }
 }
 
-// Append the utf8 elements of an ascii string to a [UInt8]
+// Append the utf8 elements of an utf16 substring to a [UInt8]
 @inline(never)
 public func run_ArrayAppendUTF16Substring(_ N: Int) {
   let s = "the quick brown 🦊 jumps over the lazy dog"[...]

    }
  }
}


@inline(never)
public func appendToFromGeneric<
  R: RangeReplaceableCollection, S: Sequence
>(collection: inout R, sequence: S)
where R.Element == S.Element {
  collection.append(contentsOf: sequence)
}
