ref: da7e8299e145dc5099e2d0f52ba20b117128e1df
dir: /sys/lib/python/mercurial/templates/atom/filelog.tmpl/
{header}
<id>{urlbase}{url}atom-log/tip/{file|escape}</id>
<link rel="self" href="{urlbase}{url}atom-log/tip/{file|urlescape}"/>
<title>{repo|escape}: {file|escape} history</title>
{latestentry%feedupdated}
{entries%changelogentry}
</feed>