ci: check doc comments with nightly format (#1857)

.github/workflows/check.yml

@@ -104,14 +104,17 @@ jobs:
       - name: Checkout sources
         uses: actions/checkout@v3
 
-      - name: Install stable toolchain
-        uses: dtolnay/rust-toolchain@stable
+      - name: Install nightly toolchain
+        uses: dtolnay/rust-toolchain@v1
+        with:
+          components: rustfmt
+          toolchain: nightly
 
       - name: Add problem matchers
         run: echo "::add-matcher::.github/rust.json"
 
-      - name: Run cargo fmt
-        run: cargo fmt --all -- --check
+      - name: Check code formatting
+        run: cargo fmt --all -- --check --unstable-features --config format_code_in_doc_comments=true
 
   min-vers:
     name: Minimal crate versions

twilight-http/src/request/application/interaction/delete_response.rs

@@ -17,7 +17,7 @@ use twilight_model::id::{marker::ApplicationMarker, Id};
 /// # #[tokio::main]
 /// # async fn main() -> Result<(), Box<dyn std::error::Error>> {
 /// use std::env;
-/// use twilight_http::{Client, request::AuditLogReason};
+/// use twilight_http::{request::AuditLogReason, Client};
 /// use twilight_model::id::Id;
 ///
 /// let client = Client::new(env::var("DISCORD_TOKEN")?);

twilight-http/src/request/application/interaction/get_followup.rs

@@ -23,7 +23,7 @@ use twilight_model::{
 /// # #[tokio::main]
 /// # async fn main() -> Result<(), Box<dyn std::error::Error>> {
 /// use std::env;
-/// use twilight_http::{Client, request::AuditLogReason};
+/// use twilight_http::{request::AuditLogReason, Client};
 /// use twilight_model::id::Id;
 ///
 /// let client = Client::new(env::var("DISCORD_TOKEN")?);

twilight-http/src/request/application/interaction/get_response.rs

@@ -20,7 +20,7 @@ use twilight_model::{
 /// # #[tokio::main]
 /// # async fn main() -> Result<(), Box<dyn std::error::Error>> {
 /// use std::env;
-/// use twilight_http::{Client, request::AuditLogReason};
+/// use twilight_http::{request::AuditLogReason, Client};
 /// use twilight_model::id::Id;
 ///
 /// let client = Client::new(env::var("DISCORD_TOKEN")?);

twilight-model/src/channel/message/component/mod.rs

@@ -125,7 +125,9 @@ impl Component {
     /// Type of component that this is.
     ///
     /// ```
-    /// use twilight_model::channel::message::component::{Button, ButtonStyle, Component, ComponentType};
+    /// use twilight_model::channel::message::component::{
+    ///     Button, ButtonStyle, Component, ComponentType,
+    /// };
     ///
     /// let component = Component::Button(Button {
     ///     custom_id: None,