In en/issues.dbk, below paragraphs seem to be duplicated.
Not all the same, but mostly.
<title>Things to do post upgrade before rebooting</title>
<!-- If there is nothing to do -->
When <literal>apt full-upgrade</literal> has finished, the
<quote>formal</quote> upgrade is complete. For the upgrade to
&releasename;, there are no special actions needed before
performing a reboot.
<!-- If there is something to do -->
When <literal>apt full-upgrade</literal> has finished, the <quote>formal</quote> upgrade
is complete, but there are some other things that should be taken care of
<emphasis>before</emphasis> the next reboot.
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