code: public char[] prepareSource(char[] source) {
          char[] src = new char[source.length + 2];
          System.arraycopy(source, 0, src, 0, source.length);
          src[source.length] = '\n';
          src[source.length + 1] = '\n';
          return src;
      }
docs: Adds two trailing newlines.
  
  @param source the markdown source to process
  @return the processed source