Upgrade to Rust 1.85 and Rust 2024 edition.

There are a couple of migration suggestions from `cargo fix --edition` that I have deliberately skipped, which are intended to make sure that the changes to `if let` scoping don't bite us. They don't, I'm pretty sure, and if I turn out to be wrong, I'd rather fix the scoping issues (as they arise) than use `match` (`cargo fix --edition`'s suggestion).

This change also includes a bulk reformat and a clippy cleanup.

NOTA BENE: As this requires a new Rust toolchain, you'll need to update Rust (`rustup update`, normally) or the server won't build. This also applies to the Debian builder Docker image; it'll need to be rebuilt (from scratch, pulling its base image again) as well.

1 files changed, 2 insertions, 2 deletions

diff --git a/src/message/history.rs b/src/message/history.rs
index ed8f5df..1a72c08 100644
--- a/src/message/history.rs
+++ b/src/message/history.rs
@@ -1,8 +1,8 @@
 use itertools::Itertools as _;
 
 use super::{
-    event::{Deleted, Event, Sent},
     Id, Message,
+    event::{Deleted, Event, Sent},
 };
 use crate::event::{Instant, Sequence};
 
@@ -58,7 +58,7 @@ impl History {
         })
     }
 
-    pub fn events(&self) -> impl Iterator<Item = Event> {
+    pub fn events(&self) -> impl Iterator<Item = Event> + use<> {
         [self.sent()]
             .into_iter()
             .merge_by(self.deleted(), Sequence::merge)