style(rust): Format all Rust code with rustfmt

Change-Id: Iab7e00cc26a4f9727d3ab98691ef379921a33052
Reviewed-on: https://cl.tvl.fyi/c/depot/+/5240
Tested-by: BuildkiteCI
Reviewed-by: kanepyork <rikingcoding@gmail.com>
Reviewed-by: Profpatsch <mail@profpatsch.de>
Reviewed-by: grfn <grfn@gws.fyi>
Reviewed-by: tazjin <tazjin@tvl.su>

fun/paroxysm/src/keyword.rs

@@ -1,8 +1,7 @@
 use crate::models::{Entry, Keyword, NewEntry, NewKeyword};
 use diesel::pg::PgConnection;
 use diesel::prelude::*;
-use failure::format_err;
-use failure::Error;
+use failure::{format_err, Error};
 use std::borrow::Cow;
 
 /// Maximum number of times we'll follow a `see: ` pointer.