🚀 go-pugleaf

I am trying to get outline-mode to work with latex.  The manual describes how
to use levels with a formatter that uses @chap and @section, but not other
notations like latex's \chap and \section.  After reading the regexp part of
the manual, I decided the correct magic should be:

(setq outline-regexp '"\\chap\\|\\\\(sub\\)*section")

But this doesn't seem to work with gnuemacs v. 18.55.8 running on a
sparstation 1+.  Specifically, when I use this to try and hide (C-c C-h)
levels, I get the error: "Unmatched \\)".  I've played around with a dozen
varients, but can't get this to work.

Am I making a mistake, or is this simply a matter of an old
version of emacs? 

			-Rob