do not skip span for newline textnodes otherwise compute_new_comment_positions() will return bad results for pandoc texts.
input.btn {
color:#050;
font: bold 84% "Droid Sans", Verdana, sans-serif;
background-color:#fed;
border: 1px solid;
border-color: #696 #363 #363 #696;
filter:progid:DXImageTransform.Microsoft.Gradient
(GradientType=0,StartColorStr='#ffffffff',EndColorStr='#ffeeddaa');
}