engine overview fix torrent table

docs/dev/engine_overview.rst

@@ -247,7 +247,7 @@ torrent
 
 +------------------+---------------------------------------------------------------------------------------------------------------------------------------+
 | result-parameter | information                                                                                                                           |
-+------------------+---------------------------------------------------------------------------------------------------------------------------------------+
++==================+=======================================================================================================================================+
 | template         | is set to ``torrent.html``                                                                                                            |
 +------------------+---------------------------------------------------------------------------------------------------------------------------------------+
 | url              | string, url of the result                                                                                                             |