fix sniff Squiz.WhiteSpace.SuperfluousWhitespace reported by phpcs

SimpleTooltip.i18n.php

@@ -32,7 +32,7 @@ function wfJsonI18nShimSimpleTooltip( $code, &$cachedData ) {
 				}
 				$cachedData['messages'] = array_merge( $data, $cachedData['messages'] );
 			}
-			
+
 			$cachedData['deps'][] = new FileDependency( $fileName );
 		}
 		return true;