the first thing that is done to any AsciiDoc document is to remove trailing spaces from all lines (called normalization). So it's not possible to make trailing spaces significant.
Is this normalization part of the "specs" -- or is this an implementation detail?
I also managed to have a "blank" title using a non-breaking space (u+00a0) after the plain space in the section title.
I assume the normalization process only removes space and tab in the current implementation. If
I remember it well, you said elsewhere only these two characters should be considered as spaces. But not all the white spaces
as defined by Unicode (see the https://unicode.org/reports/tr44/#White_Space
). Or am I wrong here?