Adapt to new Singular sat API

Author: antonio-rojas

src/sage/rings/polynomial/multi_polynomial_ideal.py

@@ -2446,7 +2446,11 @@ def saturation(self, other):
             (Ideal (y, x^5) of Multivariate Polynomial Ring in x, y, z over Algebraic Field, 4)
         """
         from sage.libs.singular.function_factory import ff
-        sat = ff.elim__lib.sat
+        # function renamed in singular > 4.2.3p4
+        try:
+            sat = ff.elim__lib.sat_with_exp
+        except NameError:
+            sat = ff.elim__lib.sat
         R = self.ring()
         ideal, expo = sat(self, other)
         return (R.ideal(ideal), ZZ(expo))