correct error message

Author: mhabedan

hepdata_cli/api.py

@@ -86,7 +86,7 @@ def find(self, query, keyword=None, ids=None, max_matches=MAX_MATCHES, matches_p
             elif format in (set, tuple):
                 return format(find_results)
             else:
-                raise TypeError(f"Cannot return results in specfied format: {format}. Allowed formats are: {str}, {list}.")
+                raise TypeError(f"Cannot return results in specfied format: {format}. Allowed formats are: {str}, {list}, {set}, {tuple}.")
 
     def download(self, id_list, file_format=None, ids=None, table_name='', download_dir='./hepdata-downloads'):
         """