misc/vim/ftplugin/factor.vim: add b:did_ftplugin at the top
misc/vim/ftplugin/factor.vim: add b:did_ftplugin at the top

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