I think it's quite a bit easier to read in this way.
<para>The file format is one line per user or group containing
name, ID, GECOS field description and home directory:</para>
- <programlisting># Type Name ID GECOS
-u httpd 440 "HTTP User"
-u authd /usr/bin/authd "Authorization user"
-g input - -
-m authd input
-u root 0 "Superuser" /root</programlisting>
+ <programlisting>#Type Name ID GECOS Home directory
+u httpd 440 "HTTP User"
+u authd /usr/bin/authd "Authorization user"
+g input - -
+m authd input
+u root 0 "Superuser" /root</programlisting>
<para>Empty lines and lines beginning with the <literal>#</literal> character are ignored, and may be used for
commenting.</para>