Black formatting

Author: jorgensd

src/festim/hydrogen_transport_problem.py

@@ -1472,13 +1472,17 @@ def mixed_term(u, v, n):
                         interface.id
                     ) - 0.5 * mixed_term(
                         v_b, (u_b / K_b - u_t / K_t), n_0
-                    ) * dInterface(interface.id)
+                    ) * dInterface(
+                        interface.id
+                    )
 
                     F_1 = +0.5 * mixed_term((u_b + u_t), v_t, n_0) * dInterface(
                         interface.id
                     ) - 0.5 * mixed_term(
                         v_t, (u_b / K_b - u_t / K_t), n_0
-                    ) * dInterface(interface.id)
+                    ) * dInterface(
+                        interface.id
+                    )
                     F_0 += (
                         2
                         * gamma
@@ -1699,9 +1703,9 @@ def post_processing(self):
                     export.write(t=float(self.t))
 
             elif isinstance(export, exports.Profile1DExport):
-                assert export.subdomain, (
-                    "Profile1DExport requires a subdomain to be set"
-                )
+                assert (
+                    export.subdomain
+                ), "Profile1DExport requires a subdomain to be set"
                 u = export.subdomain.u
                 if export._dofs is None:
                     index = self.subdomain_to_species[export.subdomain].index(