asciidoctor-epub3 hangs on JRuby+Windows when converts data\samples\sample-book.adoc

[slonopotamus]

Way to reproduce:

0. asiidoctor-epub3 master branch
1. Windows (10 in my case)
2. JRuby (9.2.9.0 in my case)
3. [jruby]\bin\bundle exec asciidoctor-epub3 data\samples\sample-book.adoc

Expected: sample-book.epub is created

Actual: process hangs forever

[slonopotamus]

Minimized testcase:

book.adoc

= Da Book
:doctype: book

include::chapter.adoc[]

chapter.adoc:

= Teh Chapter

[source]
----
A
----

Now, try bundle exec asciidoctor-epub3 book.adoc and observe a hang.

[slonopotamus]

Given that pygments.rb doesn't pass its own test suite on JRuby (pygments/pygments.rb#190), by powers granted to me I disable usage of pygments.rb on JRuby.

[mojavelinux]

Pygments still works with JRuby on Linux. We have tests in Asciidoctor core and PDF that prove that. So let's not overstate this incompatibility.

[slonopotamus]

Note to myself: I have no information why pygments.rb was disabled on AsciidoctorJ before cb8c61a.

[mojavelinux]

There was a time very long ago that pygments.rb didn't work on JRuby. That changed as of pygments.rb 1.2. It should work.

[mojavelinux]

I think this exception needs to be more specific. It should be JRuby on Windows. I expect it to work on Windows with CRuby.