code: public static void append(File file, Reader reader) throws IOException {
          append(file, reader, false);
      }
docs: Append the text supplied by the Writer at the end of the File without writing a BOM.
  
  @param file   a File
  @param reader the Reader supplying the text to append at the end of the File
  @throws IOException if an IOException occurs.
  @since 2.3