Insert or remove content in an Rd fragment.
Rdo_flatinsert(rdo, val, pos, before = TRUE)Rdo_flatremove(rdo, from, to)
the modified rdo
an Rd object.
the value to insert.
position.
if TRUE, insert the new content at pos, pushing the element at pos forward.
beginning of the region to remove.
end of the region to remove.
Georgi N. Boshnakov
Rdo_flatinsert inserts val at position pos,
effectively by concatenation.
Rdo_flatremove removes elements from from to to.