updated core to 7.53

includes/file.inc

@@ -273,7 +273,9 @@ function file_default_scheme() {
  *   The normalized URI.
  */
 function file_stream_wrapper_uri_normalize($uri) {
-  $scheme = file_uri_scheme($uri);
+  // Inline file_uri_scheme() function call for performance reasons.
+  $position = strpos($uri, '://');
+  $scheme = $position ? substr($uri, 0, $position) : FALSE;
 
   if ($scheme && file_stream_wrapper_valid_scheme($scheme)) {
     $target = file_uri_target($uri);
@@ -1559,7 +1561,7 @@ function file_save_upload($form_field_name, $validators = array(), $destination
     return FALSE;
   }
 
-  // Add in our check of the the file name length.
+  // Add in our check of the file name length.
   $validators['file_validate_name_length'] = array();
 
   // Call the validation functions specified by this function's caller.
@@ -1785,7 +1787,7 @@ function file_validate_is_image(stdClass $file) {
 /**
  * Verifies that image dimensions are within the specified maximum and minimum.
  *
- * Non-image files will be ignored. If a image toolkit is available the image
+ * Non-image files will be ignored. If an image toolkit is available the image
  * will be scaled to fit within the desired maximum dimensions.
  *
  * @param $file
@@ -2022,7 +2024,7 @@ function file_download() {
  *
  * @see file_transfer()
  * @see file_download_access()
- * @see hook_file_downlaod()
+ * @see hook_file_download()
  */
 function file_download_headers($uri) {
   // Let other modules provide headers and control access to the file.