man: drop whitespace from final <programlisting> lines
In the troff output, this doesn't seem to make any difference. But in the html output, the whitespace is sometimes preserved, creating an additional gap before the following content. Drop it everywhere to avoid this.
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@@ -265,7 +265,7 @@
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send them out over the network using the usual rules for multi-label name routing <footnote><para>For
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example, if <filename>/etc/resolv.conf</filename> has <programlisting>nameserver 127.0.0.53
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search foobar.com barbar.com
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</programlisting>and we look up <literal>localhost</literal>, <filename>nss-dns</filename> will send
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</programlisting>and we look up <literal>localhost</literal>, <filename>nss-dns</filename> will send
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the following queries to <filename>systemd-resolved</filename> listening on 127.0.0.53:53: first
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<literal>localhost.foobar.com</literal>, then <literal>localhost.barbar.com</literal>, and finally
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<literal>localhost</literal>. If (hopefully) the first two queries fail,
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