corrected precedence, added comments to each entry

lib/ansible/parsing/dataloader.py

@@ -304,11 +304,15 @@ class DataLoader:
                 search.append(unfrackpath(os.path.join(basedir, 'tasks', source), follow=False))
 
             # try to create absolute path for loader basedir + templates/files/vars + filename
-            search.append(unfrackpath(os.path.join(basedir, source), follow=False))
             search.append(unfrackpath(os.path.join(dirname, source), follow=False))
+
+            # try to create absolute path for loader basedir
+            search.append(unfrackpath(os.path.join(basedir, source), follow=False))
+
+            # try to create absolute path for  dirname + filename
             search.append(self.path_dwim(os.path.join(dirname, source)))
 
-            # try to create absolute path for loader basedir + filename
+            # try to create absolute path for filename
             search.append(self.path_dwim(source))
 
         for candidate in search: