Fragment errors are reported for redirect pages #120
Description
When a type is exported in a prelude, rustdoc sometimes generates a redirection page. Funny enough, sometimes the destination page is in the prelude module, but this issue is not about that.
deadlinks doesn't follow redirection pages and reports Fragment #... at ... does not exist! errors. An example of this can be found here: https://github.com/embedded-graphics/embedded-text/runs/1453160019?check_suite_focus=true - in this case the fragment exists at embedded_graphics/prelude/trait.DrawTarget.html#associatedtype.Error