Fix styling

src/Countries/Belgium.php

@@ -53,5 +53,4 @@ protected function variableHolidays(int $year): array
             'Pinkstermaandag' => $easter->addDays(50),
         ];
     }
-
 }

src/Countries/Country.php

@@ -10,18 +10,17 @@ public static function find(string $countryCode): ?Country
     {
         $countryCode = strtolower($countryCode);
 
-        foreach (glob(__DIR__ . '/../Countries/*.php') as $filename) {
+        foreach (glob(__DIR__.'/../Countries/*.php') as $filename) {
             if (basename($filename) === 'Country.php') {
                 continue;
             }
 
             // determine class name from file name
-            $countryClass = "\\Spatie\\Holidays\\Countries\\" .  basename($filename, '.php');
+            $countryClass = '\\Spatie\\Holidays\\Countries\\'.basename($filename, '.php');
 
             /** @var \Spatie\Holidays\Countries\Country $country */
             $country = new $countryClass;
 
-
             if (strtolower($country->countryCode()) === $countryCode) {
                 return $country;
             }
@@ -30,7 +29,7 @@ public static function find(string $countryCode): ?Country
         return null;
     }
 
-    abstract function countryCode(): string;
+    abstract public function countryCode(): string;
 
     abstract public function get(int $year): array;