Fix "array to string conversion" in 3.5.0 (#1102)

This commit broke the debugbar: 51c8ea3#diff-8a2d53e88e43b04de0cc4f64882d91feR63 since sprintf() uses multiple arguments, it doesn't accept an array of arguments.

src/DataFormatter/SimpleFormatter.php

@@ -61,7 +61,7 @@ private function exportValue($value, $depth = 1, $deep = false)
 
             if ($deep) {
                 $args = [$indent, implode(sprintf(", \n%s", $indent), $a), str_repeat('  ', $depth - 1)];
-                return sprintf("[\n%s%s\n%s]", $args);
+                return sprintf("[\n%s%s\n%s]", ...$args);
             }
 
             $s = sprintf('[%s]', implode(', ', $a));