Reformatted code examples

When I upgraded by site template, I forgot to re-add div class to format source code.
Code snippet I use is from http://bguide.blogspot.com/

/*
Custom CSS class to display code snippets.
http://bguide.blogspot.com/
2008 Feb 03
*/
.mycode
{
white-space:pre;
font-family:monospace;
font-size:9pt;
line-height: 10pt;
height:auto;
width:auto;
padding:5px;
margin-left:10px;
overflow:auto;
}