src/sage/modular/dirichlet.py: Fix import

Author: Matthias Koeppe

src/sage/modular/dirichlet.py

@@ -62,7 +62,7 @@
 import sage.rings.abc
 
 from sage.arith.functions import lcm
-from sage.arith.misc import bernoulli, kronecker, factor, gcd, fundamental_discriminant, euler_phi, valuation
+from sage.arith.misc import bernoulli, binomial, factorial, kronecker, factor, gcd, fundamental_discriminant, euler_phi, valuation
 from sage.categories.map import Map
 from sage.categories.objects import Objects
 from sage.misc.cachefunc import cached_method