minor tweak to visibility parser in rdoc

I have a lot of code that opens itself up if it is being unit tested at 
the time. It usually looks like:

	protected unless $TESTING

rdoc -D was showing that it was only expecting a symbol or string after 
a visibility specifier via parse_symbol_in_arg. The following patch 
allows statements like the above to ignore any conditional modifiers 
and still understand the intended visibility as long as it is written 
in the default case:

diff -d -u -r1.6.2.17 parse_rb.rb
--- parsers/parse_rb.rb	7 May 2004 13:14:58 -0000	1.6.2.17
+++ parsers/parse_rb.rb	14 May 2004 20:33:28 -0000
@@ -2453,6 +2453,8 @@
        if peek_tk.kind_of? TkNL
  #        error("Missing argument") if singleton
          container.ongoing_visibility = vis
+      elsif peek_tk.kind_of? TkUNLESS_MOD or peek_tk.kind_of? TkIF_MOD
+        container.ongoing_visibility = vis
        else
          args = parse_symbol_arg
          container.set_visibility_for(args, vis, singleton)

I would also like to find some way to make %params% extend w/ a space 
in front of parenthesis are not used for the method definition. 
Otherwise the html renderered looks like "methodargs" with "method" 
being bold. But I can't figure this one out in my current exhausted 
mental state.