fix PHP_EOL

Author: actionm

src/FieldTrait.php

@@ -40,15 +40,15 @@ public function setSelectionSet(array $selectionSet)
  */
  protected function constructSelectionSet(): string
  {
- $attributesString = " {\n";
+ $attributesString = " {" . PHP_EOL;
  $first = true;
  foreach ($this->selectionSet as $attribute) {
 
  // Append empty line at the beginning if it's not the first item on the list
  if ($first) {
  $first = false;
  } else {
- $attributesString .= "\n";
+ $attributesString .= PHP_EOL;
  }
 
  // If query is included in attributes set as a nested query
@@ -59,7 +59,7 @@ protected function constructSelectionSet(): string
  // Append attribute to returned attributes list
  $attributesString .= $attribute;
  }
- $attributesString .= "\n}";
+ $attributesString .= PHP_EOL . "}";
 
  return $attributesString;
  }