Clean code

Author: vuongxuongminh

src/Rules/IpVN.php

@@ -70,11 +70,7 @@ protected function getIpRanges(string $ip, int $version): ?array
                 continue;
             }
 
-            if (isset($map['range'])) {
-                return $map['range'];
-            }
-
-            return null;
+            return $map['range'] ?? null;
         }
     }
 

src/Rules/MobileVN.php

@@ -21,7 +21,7 @@ public static function pregFormat(): string
             '::head::' => implode('|', [
                 '3[2-9]',
                 '5[2689]',
-                '7(0|[6-9])',
+                '7[06-9]',
                 '8[1-9]',
                 '9[0-9]',
             ]),