Bump actions/checkout from 5 to 6

Bumps [actions/checkout](https://github.com/actions/checkout) from 5 to 6.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](https://github.com/actions/checkout/compare/v5...v6)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

.github/workflows/ci.yml

@@ -21,12 +21,12 @@ jobs:
           - nightly
 
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
 
-      - uses: dtolnay/rust-toolchain@v1
+      - uses: dtolnay/rust-toolchain@master
         with:
           toolchain: ${{ matrix.rust }}
-          components: rustfmt, clippy
+          components: clippy
 
       # Make sure we test with recent deps
       - run: cargo update
@@ -34,7 +34,6 @@ jobs:
         if: "${{ matrix.rust != '1.74' }}"
       - run: cargo build --all-features --all-targets
       - run: cargo test --all-features
-      - run: cargo fmt --all -- --check
         # Note: Rust 1.74 doesn't understand edition 2024 formatting so no point
         if: "${{ matrix.rust != '1.74' }}"
       - run: cargo clippy --all-features --all-targets -- -D warnings
@@ -43,28 +42,37 @@ jobs:
     name: MSRV
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
 
-      - uses: dtolnay/rust-toolchain@v1
+      - uses: dtolnay/rust-toolchain@1.74
         with:
           toolchain: "1.70"
 
       # Test everything except experimental features.
       - run: cargo test --features backtraces,lock_api,parking_lot
 
+  formatting:
+    name: Formatting
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v6
+      # Use nightly formatting options
+      - uses: dtolnay/rust-toolchain@nightly
+        with:
+          components: rustfmt
+      - run: cargo fmt --check
+
   docs:
     name: Documentation build
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
 
-      - uses: dtolnay/rust-toolchain@v1
+      - uses: dtolnay/rust-toolchain@nightly
-        with:
-          toolchain: nightly
 
       - name: Build documentation
         env:
           # Build the docs like docs.rs builds it
           RUSTDOCFLAGS: --cfg docsrs
-        run: cargo doc --all-features
+        run: cargo doc --all-features --no-deps

rustfmt.toml

@@ -1 +1,2 @@
 style_edition="2024"
+imports_granularity="Item"

src/parkinglot.rs

@@ -47,6 +47,8 @@ pub use parking_lot::WaitTimeoutResult;
 
 pub mod tracing;
 
+// Skip reformatting the combined imports as it duplicates the guards
+#[rustfmt::skip]
 #[cfg(debug_assertions)]
 pub use tracing::{
     FairMutex, FairMutexGuard, MappedFairMutexGuard, MappedMutexGuard, MappedReentrantMutexGuard,
@@ -56,6 +58,7 @@ pub use tracing::{
     const_reentrant_mutex, const_rwlock,
 };
 
+#[rustfmt::skip]
 #[cfg(not(debug_assertions))]
 pub use parking_lot::{
     FairMutex, FairMutexGuard, MappedFairMutexGuard, MappedMutexGuard, MappedReentrantMutexGuard,

src/stdsync.rs

@@ -20,11 +20,14 @@
 //! ```
 pub use std::sync as raw;
 
+// Skip reformatting the combined imports as it duplicates the guards
+#[rustfmt::skip]
 #[cfg(not(debug_assertions))]
 pub use std::sync::{
     Condvar, Mutex, MutexGuard, Once, OnceLock, RwLock, RwLockReadGuard, RwLockWriteGuard,
 };
 
+#[rustfmt::skip]
 #[cfg(debug_assertions)]
 pub use tracing::{
     Condvar, Mutex, MutexGuard, Once, OnceLock, RwLock, RwLockReadGuard, RwLockWriteGuard,