Fixes inputs to db.execute()

__init__.py

@@ -36,15 +36,15 @@ def create_app(test_config=None):
                 db = get_db()
                 station_id = db.execute(
                     'SELECT s_id FROM station WHERE nombre_empleado=?',
-                    (place_holder)
+                    (place_holder,)
                 ).fetchone()
                 db.execute(
                     'UPDATE station SET last_turn = last_turn + 1 WHERE s_id=?',
-                    (station_id)
+                    (station_id,)
                 )
                 turn = db.execute(
                     'SELECT last_turn FROM station WHERE s_id=?',
-                    (station_id)
+                    (station_id,)
                 )
                 db.execute(
                     'INSERT INTO turno (cName, cEmail, turn, timeArrival, station)'