a += m;
    b += m;

    /* Show the differences */
    for(i=0; i<nr; i++){
      m = R[r+i*3+1];
      for(j=0; j<m; j++){
        char cMark = '-';
        if( showLn ) appendDiffLineno(pOut, a+j+1, 0, html);
        if( pRe && re_dline_match(pRe, &A[a+j], 1)==0 ) cMark = ' ';
        appendDiffLine(pOut, '-', &A[a+j], html, pRe);
      }
      a += m;
      m = R[r+i*3+2];
      for(j=0; j<m; j++){
        if( showLn ) appendDiffLineno(pOut, 0, b+j+1, html);
        appendDiffLine(pOut, '+', &B[b+j], html, pRe);