Issue #2174353 by anemes, bryanlburkholder: Fix up docs for system_retrieve_file

core/modules/system/system.module

@@ -3026,30 +3026,32 @@ function theme_system_compact_link() {
 /**
  * Attempts to get a file using Guzzle HTTP client and to store it locally.
  *
- * @param $url
+ * @param string $url
  *   The URL of the file to grab.
- *
- * @param $destination
+ * @param string $destination
  *   Stream wrapper URI specifying where the file should be placed. If a
  *   directory path is provided, the file is saved into that directory under
  *   its original name. If the path contains a filename as well, that one will
  *   be used instead.
  *   If this value is omitted, the site's default files scheme will be used,
  *   usually "public://".
- *
- * @param $managed boolean
+ * @param bool $managed
  *   If this is set to TRUE, the file API hooks will be invoked and the file is
  *   registered in the database.
- *
- * @param $replace boolean
+ * @param int $replace
  *   Replace behavior when the destination file already exists:
  *   - FILE_EXISTS_REPLACE: Replace the existing file.
  *   - FILE_EXISTS_RENAME: Append _{incrementing number} until the filename is
  *     unique.
  *   - FILE_EXISTS_ERROR: Do nothing and return FALSE.
  *
- * @return
- *   On success the location the file was saved to, FALSE on failure.
+ * @return mixed
+ *   One of these possibilities:
+ *   - If it succeeds and $managed is FALSE, the location where the file was
+ *     saved.
+ *   - If it succeeds and $managed is TRUE, a \Drupal\file\FileInterface
+ *     object which describes the file.
+ *   - If it fails, FALSE.
  */
 function system_retrieve_file($url, $destination = NULL, $managed = FALSE, $replace = FILE_EXISTS_RENAME) {
   $parsed_url = parse_url($url);