misc/vim/syntax/factor.vim: improve factorComment match
misc/vim/syntax/factor.vim: improve factorComment match

erg/factor,erg/factor,mcandre/factor,mcandre/factor,erg/factor,mcandre/factor,mcandre/factor,mcandre/factor,mcandre/factor,mcandre/factor,erg/factor,erg/factor,erg/factor,erg/factor