Correct backslash escaping to only operate on non-'path' and 'tool' types.
# /* Copyright (C) 2001
# * Housemarque Oy
# * http://www.housemarque.com
# *
# * Distributed under the Boost Software License, Version 1.0. (See
# * accompanying file LICENSE_1_0.txt or copy at
# * http://www.boost.org/LICENSE_1_0.txt)
# */
#
# /* Revised by Paul Mensonides (2002) */
#
# /* See http://www.boost.org for most recent version. */
#
# ifndef BOOST_PREPROCESSOR_TUPLE_HPP
# define BOOST_PREPROCESSOR_TUPLE_HPP
#
# include <boost/preprocessor/tuple/eat.hpp>
# include <boost/preprocessor/tuple/elem.hpp>
# include <boost/preprocessor/tuple/rem.hpp>
# include <boost/preprocessor/tuple/reverse.hpp>
# include <boost/preprocessor/tuple/to_list.hpp>
# include <boost/preprocessor/tuple/to_seq.hpp>
#
# endif