Lists are formatted with a line break when viewed with FBReader

[slonopotamus]

Please, see test project. I hope its README provides enough details, but just in case repeating them here:

I have a trivial chapter with a list:

[[_chapter1]]
= Chapter 1

* Uno
* Two
* Три
** We need to go deeper
* Lists are awesome

I use org.asciidoctor.jvm.epub Gradle plugin version 3.0.0-alpha.3 (this is the latest as of today) together with asciidoctorj-epub version 1.5.0-alpha.9 (this is the latest as of today)

Generated epub file for convenience.

I open given epub in FBReader 3.0.31 for Android (this is the latest version available via Google Play Market as of today).

Expected: list item text starts on the same line as list item marker

Actual: there’s a line break between list item marker and list item text.

Screenshot:

If I change <span class="principal"> to just <span> in OEBPS/_chapter1.xhtml inside epub file, then lists are rendered as expected.

[mojavelinux]

Up to this point, I have not tested ebooks on FBReader because I consider it to be profoundly broken.

You'll learn very quickly that you have to draw lines or else you will drive yourself insane trying to get books to work. My rule is that if the EPUB3 spec supports it, then it's the reader application's concern to fix the problem, not Asciidoctor EPUB3.

[tkgregory]

FYI, this same behaviour is happening on Kindle Paperwhite 2022.