Hello User Guide maintainers,
The main reason for wanting to do that is that some editors and web sites (including our own
git.drupalcode.org) will do nice syntax highlighting and syntax assists on .asciidoc files, rather than treating them as plain text.
So... We'll probably make this change soon, probably in the upcoming 9.0 branch.
If you have any comments on the proposed change, please either reply to this message or add a comment to the issue.
Thanks!
Jennifer