Document searching for issuables by IID requires the reference prefix
Summary
Searching for an issue by IID requires the reference prefix of #
to work. This is not documented and causes confusion when searching only by the issue IID does not work
Original description
Problem to solve
There is no way to search for an issue by number. Instead a user has to change the url in their address bar in the browser. This is not intuitive. A reasonable user should be able to type an issue number in the search issue bar, and expect to find the matching issue.
If you search for an issue number, sometimes a result shows up that is a different issue but refers to the issue number you searched in its text. This is confusing, since you may click on that issue but it is not the issue number you searched for.
Intended users
Further details
Proposal
If an issue number is searched, it should show up as the first search result.