use/enable let_underscore_must_use lint

Signed-off-by: strawberry <strawberry@puppygock.gay>

src/admin/federation/federation_commands.rs

@@ -1,4 +1,4 @@
-use std::fmt::Write as _;
+use std::fmt::Write;
 
 use ruma::{events::room::message::RoomMessageEventContent, OwnedRoomId, RoomId, ServerName, UserId};
 
@@ -20,7 +20,8 @@ pub(crate) async fn incoming_federeation(_body: Vec<&str>) -> Result<RoomMessage
 
 	for (r, (e, i)) in map.iter() {
 		let elapsed = i.elapsed();
-		let _ = writeln!(msg, "{} {}: {}m{}s", r, e, elapsed.as_secs() / 60, elapsed.as_secs() % 60);
+		writeln!(msg, "{} {}: {}m{}s", r, e, elapsed.as_secs() / 60, elapsed.as_secs() % 60,)
+			.expect("should be able to write to string buffer");
 	}
 	Ok(RoomMessageEventContent::text_plain(&msg))
 }
@@ -120,7 +121,7 @@ pub(crate) async fn remote_user_in_rooms(_body: Vec<&str>, user_id: Box<UserId>)
 					members,
 					escape_html(name)
 				)
-				.unwrap();
+				.expect("should be able to write to string buffer");
 				output
 			})
 	);

src/admin/room/room_alias_commands.rs

@@ -1,4 +1,4 @@
-use std::fmt::Write as _;
+use std::fmt::Write;
 
 use ruma::{events::room::message::RoomMessageEventContent, RoomAliasId};
 
@@ -79,12 +79,13 @@ pub(crate) async fn process(command: RoomAliasCommand, _body: Vec<&str>) -> Resu
 				match aliases {
 					Ok(aliases) => {
 						let plain_list = aliases.iter().fold(String::new(), |mut output, alias| {
-							writeln!(output, "- {alias}").unwrap();
+							writeln!(output, "- {alias}").expect("should be able to write to string buffer");
 							output
 						});
 
 						let html_list = aliases.iter().fold(String::new(), |mut output, alias| {
-							writeln!(output, "<li>{}</li>", escape_html(alias.as_ref())).unwrap();
+							writeln!(output, "<li>{}</li>", escape_html(alias.as_ref()))
+								.expect("should be able to write to string buffer");
 							output
 						});
 
@@ -106,7 +107,8 @@ pub(crate) async fn process(command: RoomAliasCommand, _body: Vec<&str>) -> Resu
 						let plain_list = aliases
 							.iter()
 							.fold(String::new(), |mut output, (alias, id)| {
-								writeln!(output, "- `{alias}` -> #{id}:{server_name}").unwrap();
+								writeln!(output, "- `{alias}` -> #{id}:{server_name}")
+									.expect("should be able to write to string buffer");
 								output
 							});
 
@@ -120,7 +122,7 @@ pub(crate) async fn process(command: RoomAliasCommand, _body: Vec<&str>) -> Resu
 									escape_html(id.as_ref()),
 									server_name
 								)
-								.unwrap();
+								.expect("should be able to write to string buffer");
 								output
 							});
 

src/admin/room/room_commands.rs

@@ -1,4 +1,4 @@
-use std::fmt::Write as _;
+use std::fmt::Write;
 
 use ruma::{events::room::message::RoomMessageEventContent, OwnedRoomId};
 
@@ -48,7 +48,7 @@ pub(crate) async fn list(_body: Vec<&str>, page: Option<usize>) -> Result<RoomMe
 					members,
 					escape_html(name)
 				)
-				.unwrap();
+				.expect("should be able to write to string buffer");
 				output
 			})
 	);

src/admin/room/room_directory_commands.rs

@@ -1,4 +1,4 @@
-use std::fmt::Write as _;
+use std::fmt::Write;
 
 use ruma::{events::room::message::RoomMessageEventContent, OwnedRoomId};
 
@@ -65,7 +65,7 @@ pub(crate) async fn process(command: RoomDirectoryCommand, _body: Vec<&str>) ->
 							members,
 							escape_html(name.as_ref())
 						)
-						.unwrap();
+						.expect("should be able to write to string buffer");
 						output
 					})
 			);

src/admin/room/room_moderation_commands.rs

@@ -122,7 +122,9 @@ pub(crate) async fn process(command: RoomModerationCommand, body: Vec<&str>) ->
 						&local_user, &room_id
 					);
 
-					_ = leave_room(&local_user, &room_id, None).await;
+					if let Err(e) = leave_room(&local_user, &room_id, None).await {
+						warn!(%e, "Failed to leave room");
+					}
 				}
 			} else {
 				for local_user in services()
@@ -329,7 +331,9 @@ pub(crate) async fn process(command: RoomModerationCommand, body: Vec<&str>) ->
 								 admins too)",
 								&local_user, room_id
 							);
-							_ = leave_room(&local_user, &room_id, None).await;
+							if let Err(e) = leave_room(&local_user, &room_id, None).await {
+								warn!(%e, "Failed to leave room");
+							}
 						}
 					} else {
 						for local_user in services()

src/admin/user/user_commands.rs

@@ -65,7 +65,8 @@ pub(crate) async fn create(
 		.new_user_displayname_suffix
 		.is_empty()
 	{
-		_ = write!(displayname, " {}", services().globals.config.new_user_displayname_suffix);
+		write!(displayname, " {}", services().globals.config.new_user_displayname_suffix)
+			.expect("should be able to write to string buffer");
 	}
 
 	services()