[hibernate-dev] Can't build Hibernate ORM 5.1 documentation

[Gail Badner]

I'm getting ready to release 5.1.17, but I'm having trouble building the
documentation.

I can't even build the documentation using 5.1.16 tag. It worked fine when
I released 5.1.16.Final in August.

A new property was added for HHH-13011, and I need to get that documented
in the user guide for 5.1.17.

Here is what I'm seeing when I execute `./gradlew buildDocs`:

:documentation:renderDocBook_mappingGuide_en-US_html
rendering Book(mappingGuide) en-US/html
Extending script classloader with the jdocbookXsl dependencies
redirecting console output to file
[/home/gbadner/git/hibernate-orm-5.1-copy/documentation/target/docbook/work/mappingGuide/log/console-en-US-html.log]

Error on line 1 column 1 of http://docbook.org/xml/5.0/dtd/docbook.dtd:
 Error reported by XML parser: The markup declarations contained or pointed
to by the document type declaration must be well-formed.
Resetting console output
:documentation:renderDocBook_mappingGuide_en-US_html FAILED

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task
':documentation:renderDocBook_mappingGuide_en-US_html'.
> error rendering [org.xml.sax.SAXParseException; systemId:
http://docbook.org/xml/5.0/dtd/docbook.dtd; lineNumber: 1; columnNumber: 1;
The markup decl
arations contained or pointed to by the document type declaration must be
well-formed.] on Hibernate_Mapping_Guide.xml

The log file (/home/gbadner/git/hibernate-orm-5.1-copy/documentation/target/docbook/work/mappingGuide/log/console-en-US-html.log)
was empty.

I'm attaching the console log from executing `./gradlew buildDocs --debug
--info`.

Any ideas???

Thanks,
Gail