Fix CI rustfmt job (#841)

* fix CI rustfmt job

* apply nightly rustfmt

* re-apply nightly rustftm

.github/workflows/rust.yml

@@ -109,16 +109,11 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11
-      - uses: actions-rs/toolchain@v1
+      - uses: dtolnay/rust-toolchain@nightly
         with:
-          profile: minimal
-          toolchain: nightly
-          override: true
           components: rustfmt
-      - uses: actions-rs/cargo@v1
-        with:
-          command: fmt
-          args: --all -- --check
+      - name: Foramtting
+        run: cargo fmt --all -- --check
 
   doc:
     name: Documentation

crates/wasmi/tests/spec/run.rs

@@ -25,19 +25,23 @@ pub fn run_wasm_spec_test(name: &str, config: Config) {
     lexer.allow_confusing_unicode(true);
     let parse_buffer = match ParseBuffer::new_with_lexer(lexer) {
         Ok(buffer) => buffer,
-        Err(error) => panic!(
-            "failed to create ParseBuffer for {}: {}",
-            test.path(),
-            error
-        ),
+        Err(error) => {
+            panic!(
+                "failed to create ParseBuffer for {}: {}",
+                test.path(),
+                error
+            )
+        }
     };
     let wast = match wast::parser::parse(&parse_buffer) {
         Ok(wast) => wast,
-        Err(error) => panic!(
-            "failed to parse `.wast` spec test file for {}: {}",
-            test.path(),
-            error
-        ),
+        Err(error) => {
+            panic!(
+                "failed to parse `.wast` spec test file for {}: {}",
+                test.path(),
+                error
+            )
+        }
     };
 
     execute_directives(wast, &mut context).unwrap_or_else(|error| {