encoding/htmlindex: use PreferSameScript

has no effect now, but captures intent better
so should be better for future compatibility.

Change-Id: Ia39bb0492feebf1ba2be52badde2fb31f3f0ed7b
Reviewed-on: https://go-review.googlesource.com/54690
Run-TryBot: Marcel van Lohuizen <mpvl@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Nigel Tao <nigeltao@golang.org>
1 file changed