recent changes to help functions

[John W. Eaton]

Since your original patch for converting the help system to .m files
was done back in March 2008, the following changes in help.cc might
have been lost:

2008-08-19  David Bateman  <address@hidden>

        * load-path.cc (load-path::do_find_dir (const std:string&) const)):
        Method to find a directory on the load-path corresponding to the
        argument.
        * load-path.h (load-path::do_find_dir (const std:string&) const),
        load-path::find_dir (const std::string&) const): New methods.
        * utils.cc (std::string contents_file_in_path (const std::string&)):
        New function.
        * utils.h  (std::string contents_file_in_path (const std::string&)): 
        Declare it.
        * help.cc (static bool raw_help_from_file (const std::string&,
        std::string&, std::string&, bool&)): Also check is requested
        argument is a directory and contains the file Contents.m.

2008-08-04  John W. Eaton  <address@hidden>

        * octave.cc (initialize_pathsearch): Fix usage of
        file_ops::dir_sep_str.
        * help.cc (Flookfor): Likewise.
        * dirfns.cc (Ffilesep): Likewise.
        (Fautoload): Likewise.

2008-05-04  John W. Eaton  <address@hidden>

        * help.cc (make_name_list): Call symbol_table::global_variable_names
        and symbol_table::top_level_variable_names instead of passing
        scope to symbol_table::variable_names.

I also see that things like

  help @a/a

are not working now, and they did before the switch to the .m file
help.

jwe