Dependency link replaced by crate name on browser-back

[jmagnuson]

For some crates, when following a dependency link and then performing a browser-back to return to the original crate page, the previous link text is replaced by the name of the crate itself (e.g., ahrs dependency nalgebra becomes ahrs; also occurs in multi-dependency lists such as abc).

However, that doesn't appear to be the case for all crates (e.g., nalgebra), so maybe there's an issue with the metadata?

This has been tested on Chrome and Firefox, so I don't think it's a browser-specific issue.

[carols10cents]

I think this is a dupe of #306, please reopen if I'm missing something :)