I want link wiki-page to issue text.
[]() syntax links into issues pool.
[[text|page]] doesn't work.
How to do it?
Use [text](link_to_wiki_page) where link_to_wiki_page is the full URL of the wiki page you want to link to. Just navigate to the page and copy/paste the URL from the URL bar.
You can also use relative paths. Here's an example from one of my projects:
[Using-a-Shell-Configuration-File](../wiki/Using-a-Shell-Configuration-File)
I prefer this approach to full paths, since it's not impossible that you might rename a project or transfer ownership to someone else, and so break any absolute references to parts of the repo.
来源：https://stackoverflow.com/questions/12472682/github-link-from-issue-to-wiki