I think that this page
https://asciidoctor.org/docs/asciidoc-asciidoctor-diffs/lack one difference between asciidoc and asciidoctor: quotes and
doublequotes are handled differently.
There us no such thing as `` ... '' style of quote in asciidoctor for
example and "' of asciidoctor is unrecognized to asciidoc. See here:
https://docs.asciidoctor.org/asciidoc/latest/text/quotation-marks-and-apostrophes/That complicate the passage from asciidoc to asciidoctor since one have
to check for these things in the source files and change them
accordingly before switching tool.
--
Saluton,
Marco Ciampa