Update tests/phpunit/tests/admin/includes/misc/insertWithMarkers.php

Co-authored-by: Weston Ruter <[email protected]>

Author: pbearne

tests/phpunit/tests/admin/includes/misc/insertWithMarkers.php

@@ -57,9 +57,7 @@ public function test_insert_with_markers( $initial_content, $marker, $insertion,
  /**
   * Data provider for test_insert_with_markers.
   *
-  * @return array[]
-  *
-  * @phpstan-return array<string, array{
+  * @return array<string, array{
   *     initial_content: string,
   *     marker:          string,
   *     insertion:       string|string[],