Merge pull request #511 from Wuerfel21/W21-simpleio

Actually allow setting _SIMPLE_IO manually

Author: totalspectrum

include/libsys/fmt.h

@@ -9,7 +9,7 @@
 #include <errno.h>
 
 #define INCLUDE_FLOATS
-#undef _SIMPLE_IO
+//#undef _SIMPLE_IO
 
 #ifdef __FLEXC__