error: this URL is not a hyperlink
  --> $DIR/diagnostic-width.rs:4:41
   |
LL | ... a http://link.com
   |       ^^^^^^^^^^^^^^^
   |
   = note: bare URLs are not automatically turned into clickable links
note: the lint level is defined here
  --> $DIR/diagnostic-width.rs:2:9
   |
LL | ...ny(rustdoc::bare_url...
   |       ^^^^^^^^^^^^^^^^^^
help: use an automatic link instead
   |
LL | /// This is a long line that contains a <http://link.com>
   |                                         +               +

error: aborting due to 1 previous error