Use ruff for formatting

notebooks/01_simple-tests.ipynb

@@ -260,6 +260,7 @@
     "X_train_scaled, X_test_scaled = datamanip.scale_data(x_train, x_test)\n",
     "y_train_scaled, y_test_scaled = datamanip.scale_data(y_train, y_test)\n",
     "\n",
+    "\n",
     "def get_regression_model(\n",
     "    n_hidden_layers: int, n_neurons: int, activation: type = LeakyReLU\n",
     ") -> list[Layer]:\n",
@@ -383,7 +384,7 @@
     "beta = optimizers.Ridge_parameters(X_train_scaled, y_train_scaled, lam=1e-10)\n",
     "y_pred = X_test_scaled @ beta\n",
     "test_mse = mean_squared_error(y_test_scaled, y_pred)\n",
-    "print(f\"OLS Test MSE: {test_mse}\")\n"
+    "print(f\"OLS Test MSE: {test_mse}\")"
    ]
   },
   {

src/easynn/feedforward.py

@@ -55,6 +55,7 @@ class Softmax(ActivationFunction):
         s = self.forward(values)
         return s * (1 - s)
 
+
 class Sigmoid(ActivationFunction):
     def forward(self, values: np.ndarray) -> np.ndarray:
         return 1 / (1 + np.exp(-values))
@@ -63,6 +64,7 @@ class Sigmoid(ActivationFunction):
         sig = self.forward(values)
         return sig * (1 - sig)
 
+
 # === Loss Functions ===