template<> docstring bformat(docstring const & fmt, unsigned int arg1);
template<> docstring bformat(docstring const & fmt, docstring arg1);
template<> docstring bformat(docstring const & fmt, char * arg1);
template<> docstring bformat(docstring const & fmt, unsigned int arg1);
template<> docstring bformat(docstring const & fmt, docstring arg1);
template<> docstring bformat(docstring const & fmt, char * arg1);