add more debug info

Author: NoureldinYosri

tunits/core/cython/frac.pyx

@@ -87,7 +87,7 @@ cpdef frac float_to_twelths_frac(a) except *:
     cdef double d = float(a)
     cdef long long x = <long long>c_floor(12*d + 0.5)
     if abs(12*d - x) > 1e-5:
-        print(d, x, 12*d - x, a)
+        print('spit', d, x, 12*d - x, a, '%20f'%d, '%20f'%a)
         raise ValueError("Not a twelfth.")
 
     return frac_least_terms(x, 12)