fix style

src/Illuminate/Collections/Collection.php

@@ -895,7 +895,7 @@ public function reduceWithKeys(callable $callback, $initial = null)
     {
         $result = $initial;
 
-        foreach($this->items as $key => $value) {
+        foreach ($this->items as $key => $value) {
             $result = $callback($result, $value, $key);
         }
 

src/Illuminate/Collections/LazyCollection.php

@@ -856,7 +856,7 @@ public function reduceWithKeys(callable $callback, $initial = null)
     {
         $result = $initial;
 
-        foreach($this as $key => $value) {
+        foreach ($this as $key => $value) {
             $result = $callback($result, $value, $key);
         }
 

tests/Support/SupportCollectionTest.php

@@ -3602,7 +3602,7 @@ public function testReduceWithKeys($collection)
             'baz' => 'qux',
         ]);
         $this->assertEquals('foobarbazqux', $data->reduceWithKeys(function ($carry, $element, $key) {
-            return $carry .= $key . $element;
+            return $carry .= $key.$element;
         }));
     }