Fix Fragmenter issue with collapsed annotations/fragments.
Fix Fragmenter issue with collapsed annotations/fragments.

substance/substance,TypesetIO/substance,abhaga/substance,andene/substance,stencila/substance,podviaznikov/substance,andene/substance,michael/substance-1,abhaga/substance,TypesetIO/substance,substance/substance,jacwright/substance,jacwright/substance,podviaznikov/substance,michael/substance-1