This lets us encapsulate a Vec<MdElem> that represents a single area of
the doc, as opposed to a stream of disparate areas.
Note that we don't need a new MdElem variant, just a new MdElemRef variant. This is consistent with the code's existing pattern that MdElem is just the structure, and MdElemRef is various slices into that structure.
This also lets us simplify the SelectResult, since each selector now
returns exactly one element (previously, there was a Multi case for
SectionSelector, but now that's just a single Doc).
This lets us encapsulate a
Vec<MdElem>that represents a single area of the doc, as opposed to a stream of disparate areas.Note that we don't need a new
MdElemvariant, just a newMdElemRefvariant. This is consistent with the code's existing pattern thatMdElemis just the structure, andMdElemRefis various slices into that structure.This also lets us simplify the
SelectResult, since each selector now returns exactly one element (previously, there was aMulticase forSectionSelector, but now that's just a single Doc).This resolves #79.