Fix to revoke privileges for mysql user = '' Issue #9848

lib/ansible/modules/database/mysql/mysql_user.py

@@ -289,7 +289,7 @@ def privileges_get(cursor, user,host):
             return x
 
     for grant in grants:
-        res = re.match("GRANT (.+) ON (.+) TO '.+'@'.+'( IDENTIFIED BY PASSWORD '.+')? ?(.*)", grant[0])
+        res = re.match("GRANT (.+) ON (.+) TO '.*'@'.+'( IDENTIFIED BY PASSWORD '.+')? ?(.*)", grant[0])
         if res is None:
             raise InvalidPrivsError('unable to parse the MySQL grant string: %s' % grant[0])
         privileges = res.group(1).split(", ")