different, then the absolute path will be used as relative path
WARNING: the absolute path and base path must really be absolute paths!!!
*/
-std::string const
-makeRelPath(std::string const & abspath, std::string const & basepath);
+docstring const
+makeRelPath(docstring const & abspath, docstring const & basepath);
/// Strip filename from path name
std::string const onlyPath(std::string const & fname);