Update StudentT docstring

f6fea72f · Reimar Leike · ac09f9cf · f6fea72f
Commit f6fea72f authored May 01, 2020 by Reimar Leike
--- a/nifty6/operators/energy_operators.py
+++ b/nifty6/operators/energy_operators.py
@@ -286,7 +286,7 @@ class StudentTEnergy(EnergyOperator):
    ----------
    domain : `Domain` or `DomainTuple`
        Domain of the operator
-    theta : Scalar
+    theta : Scalar or Field
        Degree of freedom parameter for the student t distribution
    """