docs: private void emitMarkedLines(final StringBuilder out, final Line lines)
      {
          final StringBuilder in = new StringBuilder();
          Line line = lines;
          while (line != null)
          {
              if (!line.isEmpty)
              {
                  in.append(line.value.substring(line.leading, line.value.length() - line.trailing));
                  if (line.trailing >= 2)
                  {
                      in.append("<br />");
                  }
              }
              if (line.next != null)
              {
                  in.append('\n');
              }
              line = line.next;
          }
  
          this.recursiveEmitLine(out, in.toString(), 0, MarkToken.NONE);
      }