fixup! add more tests for InvalidPartOfEncapsedStringRule

Author: schlndh

tests/PHPStan/Rules/Cast/data/invalid-encapsed-part.php

@@ -17,7 +17,7 @@ function foo(
 	int $int,
 	float $float,
 	array $array,
-	ClassWithToString $objectWithToString,
+	ClassWithToString $objectWithToString
 ) {
 	$null = null;
 	$resource = fopen('php://input');
@@ -51,7 +51,7 @@ function checkUnions(
 	$array,
 	$objectWithToString,
 	$null,
-	$resource,
+	$resource
 ) {
 	"$std bar";
 	"$bool bar";