Convert rustfmt CI run to use stable rustfmt

.github/workflows/rustfmt.yml

@@ -7,23 +7,21 @@ on:
       - rustfmt.toml
       - '**/*.rs'
   workflow_dispatch:
-env:
-  RUST_NIGHTLY_TOOLCHAIN: nightly-2023-01-13
 jobs:
   check-formatting:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
 
       - name: Install nightly Rust
         uses: actions-rs/[email protected]
         with:
-          toolchain: ${{ env.RUST_NIGHTLY_TOOLCHAIN }}
+          toolchain: stable
           components: rustfmt
           default: true
 
       - name: Check formatting
         run: |-
           rustfmt --version
-          cargo fmt -- --check --unstable-features
+          cargo fmt -- --check

rustfmt.toml

@@ -1,10 +1,14 @@
+edition = "2021"
+
 # Activation of features, almost objectively better ;)
 use_try_shorthand = true
 use_field_init_shorthand = true
-condense_wildcard_suffixes = true
-normalize_comments = true
-wrap_comments = true
-imports_granularity = "Crate"
 
-# Heavily subjective style choices
+# Nightly only. Will not run in CI, but please format with these locally
+wrap_comments = true
+normalize_comments = true
 comment_width = 100
+
+condense_wildcard_suffixes = true
+
+imports_granularity = "Crate"