/usr/share/cups/templates/option-header.tmpl is in cups-server-common 1.7.5-11+deb8u2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 | <DIV CLASS="tab" ID="{group_id}">
<H3 ALIGN="CENTER">{group}</H3>
<TABLE WIDTH="100%">
|