message: Explain the inner and around in a comment
diff: @@ -697,6 +697,12 @@ abstract class SelectArgument extends TextObjectMovement {
  return configuration.argumentObjectSeparators;
  }
  + // SelectArgument supports two select types: inner and around.
  + //
  + // Inner will adjust start/stop positions, so that they are inside
  + // the delimiters (excluding the delimiters themselves).
  + // Around will adjust start/stop positions, so that ONE of them includes
  + // a separator character (optionally including extra whitespace).
  protected selectAround = false;
  // Requirement is that below example still works as expected, i.e.
  