largefiles: make last line of prompts <40 english chars (issue6158)
Differential Revision: https://phab.mercurial-scm.org/D6571
<item>
<title>{bookmark|escape}</title>
<link>{urlbase}{url|urlescape}rev/{node|short}</link>
<description><![CDATA[{bookmark|strip|escape|addbreaks}]]></description>
<pubDate>{date|rfc822date}</pubDate>
</item>