Michael Howell 6d6fa792ff rustdoc: clean up the layout for annotated version numbers
This should result in a layout for the actual standard library,
when built on CI, that looks like this:

    _____
   /     \ std
   |  R  | 1.74.0-nightly
   \_____/

   (203c57dbe 2023-09-17)

Having the whole version as one string caused it to flex wrap,
because the sidebar isn't wide enough to fit the whole thing.
2023-10-08 20:17:53 -07:00
..
2023-10-06 15:46:11 +00:00