What is the proper indent style for FDP?

[Hoyoung Kim]

Hello. I'm curious about indentation style.
Which is the proper one when dealing with FDP xml files?

The original FDP files follow the style like this:

       <para>We have tried to keep the number of forward references in
         the text to a minimum so that you can read this section of the
         Handbook from front to back with the minimum page flipping
         required.</para>

This is another example:

     <listitem>
       <para>Introduce you to X, the &unix; windowing system, and
         detail how to configure a desktop environment that makes
         you more productive.</para>
     </listitem>

However, when I press P in Vim Visual mode to reformat selected text, 
the style changes like this:

       <para>We have tried to keep the number of forward references in
       the text to a minimum so that you can read this section of the
       Handbook from front to back with the minimum page flipping
       required.</para>

And this:

     <listitem> <para>Introduce you to X, the &unix; windowing
     system, and detail how to configure a desktop environment that
     makes you more productive.</para> </listitem>

All the original files follow the former style, but FDP Primer suggests 
the latter style.
(https://www.freebsd.org/doc/en_US.ISO8859-1/books/fdp-primer/editor-config.html#editor-config-vim)

I want to know whether the latter style is allowed or not. Should I 
manually indent paragraphs after pressing P?

Thanks.