CSS to add line numbers to embedded gists
.gist-highlight {
border-left: 3ex solid #eee;
position: relative;
}
.gist-highlight pre {
counter-reset: linenumbers;
}
.gist-highlight pre div:before {
color: #aaa;
content: counter(linenumbers);
counter-increment: linenumbers;
left: -3ex;
position: absolute;
text-align: right;
width: 2.5ex;
}