Rustdoc search results ignore markdown formatting

[cmbrandenburg]

Using Rust 1.7, a rustdoc search result shown in the browser (as a consequence of pressing the S key and entering a search term) displays raw Markdown, not formatted text. For example, take the standard library documentation, press S, then enter the search term trait: Neg, and the search result will show this text verbatim:

The `Neg` trait is used to specify the functionality of unary `-`.

Whereas, it should be formatted—i.e., no backticks.

[steveklabnik]

Triage: no change

[camelid]

triage: still no change

[camelid]

I think I have a simple way to solve some cases of this, so I'm assigning myself since this has been open for a long time without a fix.