macro names and M-q

[Werner LEMBERG]

Some keywords like @itemx are ignored if I press M-q, others like
@code aren't.  Two questions:

  .  Which code does control this?  I couldn't find anything related
     in texinfo.el -- for example, `itemx' only appears in
     `texinfo-font-lock-keywords', but it looks implausible to me that
     this regexp is responsible for the M-q behaviour.

  .  If I define a macro in texinfo, I would like to indicate to M-q
     that it should be treated like @itemx and not like @code.  How
     can I do that?  Is there a hook which manages this?  I can
     imagine to have a string of keywords like this:

       @c Local Variables:
       @c texinfo-fill-neutrals: @foo @bar
       @c End:

BTW, I'm still using emacs 20.6.


    Werner