Fix linting

app/Models/Perceptrons/Perceptron.php

@@ -17,10 +17,11 @@ abstract class Perceptron extends Model
         $inputs = array_merge([1], $inputs); // Add bias input
 
         if (count($inputs) !== count($this->synaptic_weights)) { // Check
-            throw new \InvalidArgumentException("Number of inputs must match number of synaptic weights.");
+            throw new \InvalidArgumentException('Number of inputs must match number of synaptic weights.');
         }
 
-        $weighted_sum = array_sum(array_map(fn($input, $weight) => $input * $weight, $inputs, $this->synaptic_weights));
+        $weighted_sum = array_sum(array_map(fn ($input, $weight) => $input * $weight, $inputs, $this->synaptic_weights));
+
         return $this->activationFunction($weighted_sum);
     }