Small comment fixes for consistency (#808)

Author: anoadragon453

tests/30rooms/12thirdpartyinvite.pl

@@ -190,7 +190,7 @@
       matrix_create_and_join_room(
          [ $creator, $inviter ],
          visibility => "private",
-         preset => "private_chat",
+         preset => "private_chat",  # Allow default PL users to invite others
          with_invite => 1,
       )->then( sub {
          my ( $room_id ) = @_;

tests/41end-to-end-keys/06-device-lists.pl

@@ -731,8 +731,7 @@ sub sync_until_user_in_device_list
 
       matrix_create_room( $creator,
          invite => [ $remote_user->user_id ],
-         # Allow default PL users to invite others
-         preset => "private_chat",
+         preset => "private_chat",  # Allow default PL users to invite others
       )->then( sub {
          ( $room_id ) = @_;