Alias errors when used as @rustbot author: xxx

[fee1-dead]

Found in rust-lang/rust#92892 (comment), I wanted to write what exact parts are waiting on author so I wrote @rustbot author: xxx which caused an error.

[camelid]

FWIW, you can just write the explanation on a separate line, though I suspect you're opening this issue because you think the : style should be supported too :)

[kusabana]

This does not appear to be an issue anymore.
Input tested on aa559cc (commit near issue date):

Err(
    Error {
        input: "author: please add a ui test for the issue, in `src/test/ui/consts`, or in `src/test/ui/rfc-2632-const-trait-impl`, after that the changes LGTM.",
        position: 6,
        source: ExpectedEnd,
    },
)

Input tested on 9ea655c (current master):

Ok(
    Some(
        Author,
    ),
)

[ehuss]

Indeed, I believe this is fixed by #1640, thanks!