Fix clippy warnings (#3358)

Author: GnomedDev

command_attr/src/util.rs

@@ -30,7 +30,7 @@ impl LitExt for Lit {
         if let Lit::Bool(b) = self {
             b.value
         } else {
-            self.to_str().parse().unwrap_or_else(|_| panic!("expected bool from {:?}", self))
+            self.to_str().parse().unwrap_or_else(|_| panic!("expected bool from {self:?}"))
         }
     }
 

examples/testing/src/main.rs

@@ -219,7 +219,7 @@ async fn message(ctx: &Context, msg: Message) -> Result<(), serenity::Error> {
     } else if let Some(forum_post_url) = msg.content.strip_prefix("deleteforumpost ") {
         let (_guild_id, channel_id, _message_id) =
             serenity::utils::parse_message_url(forum_post_url).unwrap();
-        msg.channel_id.say(ctx, format!("Deleting <#{}> in 10 seconds...", channel_id)).await?;
+        msg.channel_id.say(ctx, format!("Deleting <#{channel_id}> in 10 seconds...")).await?;
         tokio::time::sleep(std::time::Duration::from_secs(10)).await;
         channel_id.delete(ctx).await?;
     } else {