rustdoc search should ensure it shows exact matches

[scottmcm]

I was trying to find https://doc.rust-lang.org/nightly/nightly-rustc/syntax/ptr/struct.P.html in rustdoc, but that doesn't show up anywhere if I just search for P: https://doc.rust-lang.org/nightly/nightly-rustc/rustc_mir/transform/?search=P

It does show up if I search for "P" (https://doc.rust-lang.org/nightly/nightly-rustc/rustc_mir/transform/?search=%22P%22) so there's a workaround, but I think it'd be nice if when I type an exact name, things with that exact name show up at the top, or something.

[GuillaumeGomez]

It's supposed to, so some adjustments need to be done on the "search engine". I'll take a look.