Support AsciiDoc for issue, merge request, epic descriptions and comment
I would like to be able to use AsciiDoc as markup-language in the whole application, including issues and MRs.
A global switch for the default setting (Markdown or AsciiDoc) would be great. For every multi-line text input, there should be an option to chose the alternative (as in not-default) markup language.
## related
- [better asciidoc rendering](https://gitlab.com/gitlab-org/gitlab-ce/issues/14209)
[Cf](https://twitter.com/gitlab/status/689147078203846656)
issue