[boost] [Bug Report] macro definition has \ followed by spaces

In order for line splicing to work, \ has to be followed by a newline. boost/1.51.0/gcc-4.8.1-glibc-2.17-fb/42097cf/include/boost/spirit/home/classic/utility/rule_parser.hpp line 422 ::BOOST_SPIRIT_CLASSIC_NS::type_of::depend_on_type<__Dummy>(x) ) \