Auto merge of #25988 - mrobinson:fix-doc, r=SimonSapin

layout_2020: Fix a documentation comment

I inadvertently failed to complete this doc comment.

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bors-servo 2020-03-19 14:40:03 -04:00 committed by GitHub
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@ -55,7 +55,9 @@ pub(crate) struct BoxFragment {
/// The scrollable overflow of this box fragment.
pub scrollable_overflow_from_children: PhysicalRect<Length>,
/// XXX Add thsi
/// If this fragment was laid out from a hoisted box, this id corresponds to the id stored in
/// the AbsoluteOrFixedPositionedFragment left as a placeholder in the tree position of the
/// box.
pub hoisted_fragment_id: Option<HoistedFragmentId>,
}