code: private void updateDistanceText(InstructionModel model) {
      if (newDistanceText(model)) {
        distanceText(model);
      } else if (upcomingDistanceText.getText().toString().isEmpty()) {
        distanceText(model);
      }
    }
docs: Looks to see if we have a new distance text.
  Sets new distance text if found.
  
  @param model provides distance text