Fix #52 adoc-nobreak-p checks adoc-nobreak text property

[TobiasZawada]

Fix #52 adoc-nobreak-p checks adoc-nobreak text property

[TobiasZawada]

Same thing like Flyspell-Overlays (see #50).

xref:LINK[LINK TEXT] is open for discussion. Asciidoctor actually accepts linebreaks in LINK TEXT but adoc-mode does not font-lock it right, since it is not multiline. (Multiline font lock is quite tricky and needs thorough work. (E.g., two-line titles also do not work very well.)

The current solution is to not let auto-fill-mode introduce artificial linebreaks into LINK TEXT. But, that is a hack.

[TobiasZawada]

It is a pity, but I have the impression that we need to remove the marking of two-line headers.
The adoc-nobreak property spills out on the text of the following paragraph. (To be investigated.)

[bbatsov]

It is a pity, but I have the impression that we need to remove the marking of two-line headers.

That'd be fine by me, but we should mention this somewhere and encourage people to avoid using those.