test running rustfmt on web-sys bindings. (#1954)

Author: richard-uk1

azure-pipelines.yml

@@ -324,7 +324,7 @@ jobs:
       - script: cargo doc --no-deps --manifest-path crates/web-sys/Cargo.toml --all-features
         displayName: "Document web-sys"
         env:
-          WEBIDL_RUSTFMT_BINDINGS: 0
+          WEBIDL_RUSTFMT_BINDINGS: 1
       - script: cargo doc --no-deps --manifest-path crates/futures/Cargo.toml
         displayName: "Document wasm-bindgen-futures"
       # Make a tarball even though a zip is uploaded, it looks like the tarball