Fix error in PHP 7.2

Author: C-Lodder

CHANGELOG.md

@@ -2,6 +2,7 @@
 
 ## WIP
 - Tweak some CSS for stylelint update
+- Fix error in PHP 7.2
 
 ## 1.1.1
 - Fix image resize/optimiser

helper.php

@@ -46,10 +46,7 @@ private function saveCss($json)
 			$string .= '}';
 
 			// Write to file
-			file_put_contents(
-				JPATH_SITE . '/templates/lightning/css/custom-variables.css',
-				$string,
-			);
+			file_put_contents(JPATH_SITE . '/templates/lightning/css/custom-variables.css', $string);
 
 			$response = Text::_('CSS variables saved');
 		}