Change order or delete operations

Author: GromNaN

source/gridfs/gridfs-spec.md

@@ -670,8 +670,8 @@ This method is an optimisation over deleting each revision of a stored file indi
 **Implementation details:**
 
 Drivers MUST first find the `_id` field of all files collection documents with the given filename. Drivers MUST then
-delete all chunks with `files_id` in the found ids that was just deleted. Drivers MUST then delete all files collection
-documents with the found ids.
+delete all files collection documents with the found ids. Drivers MUST then delete all chunks with `files_id` in the
+found ids that was just deleted.
 
 If there are no files collection documents with the given filename, drivers MUST raise an error.