export tutorials changed in dd88513 (#559)

Co-authored-by: dario-coscia <dario-coscia@users.noreply.github.com>

tutorials/tutorial15/tutorial.ipynb

@@ -259,7 +259,7 @@
     "    problem=problem,\n",
     "    model=GNN(in_features=11, out_features=19),\n",
     "    use_lt=False,\n",
-    "    loss=torch.nn.L1Loss()\n",
+    "    loss=torch.nn.L1Loss(),\n",
     ")\n",
     "trainer = Trainer(\n",
     "    solver,\n",
@@ -314,7 +314,7 @@
     }
    ],
    "source": [
-    "_=trainer.test()"
+    "_ = trainer.test()"
    ]
   },
   {
@@ -348,7 +348,9 @@
     "print(\"Here the dataset\")\n",
     "print(f\"Dataset keys: {test_dataset.keys()}\")\n",
     "print(f\"Dataset keys for data condition: {test_dataset['data'].keys()}\")\n",
-    "print(f\"Dataset values type for data condition: {[v.__class__.__name__ for v in test_dataset['data'].values()]}\")\n",
+    "print(\n",
+    "    f\"Dataset values type for data condition: {[v.__class__.__name__ for v in test_dataset['data'].values()]}\"\n",
+    ")\n",
     "\n",
     "# extract input and target for test dataset\n",
     "input_test = test_dataset[\"data\"][\"input\"]\n",
@@ -378,7 +380,7 @@
    "source": [
     "# get the prediction\n",
     "prediction_test = solver(input_test)\n",
-    "print(f'Number of prediction properties: {prediction_test.shape[-1]}')"
+    "print(f\"Number of prediction properties: {prediction_test.shape[-1]}\")"
    ]
   },
   {