This PR adds the missing option to the call inside of Makefile.PL, ensuring that the default runtime
When generating LaTeXML::MathGrammar, recent versions of Parse::RecDescent were generating a warning about the missing runtime_class option. This warning indiciated that the grammar may stop working with future versions of the RecDescent package. This commit adds the missing option to the call inside of Makefile.PL, ensuring that the default runtime Parse::RecDescent will continue to be used.
whoops... this doesn't actually work; at least not with Parse::RecDescent 1.965. if you do
it seemingly doesn't accept the 3rd arg on the line.