Internationalisation: _f ("Usage: %s [FILE]", "lilypond") gets "translated" by
GNU gettext
*/
-string _f (char const *format, ...);
+string _f (char const *format, ...)
+ __attribute__ ((format (printf, 1, 2)));
string _f (char const *format, string s, string s2 = "", string s3 = "");
#endif // INTERNATIONAL_HH