Fix stable vs. nightly comment formatting

Author: brendanzab

.github/workflows/ci.yml

@@ -42,7 +42,7 @@ jobs:
         uses: cachix/install-nix-action@v17
 
       - name: Run cargo fmt
-        run: nix develop .#${{ matrix.rust-toolchain }} --command cargo fmt
+        run: nix develop .#${{ matrix.rust-toolchain }} --command cargo fmt --check
 
   cargo-clippy:
     runs-on: ubuntu-latest

fathom/src/surface/distillation.rs

@@ -59,10 +59,10 @@ impl<'interner, 'arena, 'env> Context<'interner, 'arena, 'env> {
     }
 
     fn push_local(&mut self, name: Option<StringId>) -> StringId {
-        let name =
-            name.unwrap_or_else(|| {
-                self.interner.borrow_mut().get_or_intern_static("_") // TODO: choose a better name?
-            });
+        let name = name.unwrap_or_else(|| {
+            // TODO: choose a better name?
+            self.interner.borrow_mut().get_or_intern_static("_")
+        });
 
         // TODO: avoid globals
         // TODO: ensure we chose a correctly bound name