A doc comment that is not attached to anything has been encountered.
Erroneous code example:
trait Island {
fn lost();
/// I'm lost!
}A little reminder: a doc comment has to be placed before the item it’s supposed
to document. So if you want to document the Island trait, you need to put a
doc comment before it, not inside it. Same goes for the lost method: the doc
comment needs to be before it:
/// I'm THE island!
trait Island {
/// I'm lost!
fn lost();
}