[Style] Fix anonymous class spacing to satisfy StyleCI

Author: ahmedsaed27

tests/Support/SupportArrTest.php

@@ -1648,7 +1648,7 @@ public function testFrom()
         $this->assertSame($subject, Arr::from($items));
 
         $items = new WeakMap;
-        $items[$temp = new class{}] = 'bar';
+        $items[$temp = new class {}] = 'bar';
         $this->assertSame(['bar'], Arr::from($items));
 
         $this->expectException(InvalidArgumentException::class);