Turn cargo clippy and fmt on in Travis again

Author: alanhdu

.travis.yml

@@ -8,14 +8,14 @@ matrix:
         - cargo gen-syntax --verify
         - cargo gen-tests --verify
         - cargo test
-    # - language: rust
-    #   rust: nightly
-    #   before_script:
-    #     - rustup component add clippy-preview
-    #     - rustup component add rustfmt-preview
-    #   script:
-    #     - cargo fmt --all -- --check || true
-    #     - cargo clippy
+    - language: rust
+      rust: nightly
+      before_script:
+        - rustup component add clippy-preview
+        - rustup component add rustfmt-preview
+      script:
+        - cargo fmt --all -- --check || true
+        - cargo clippy
     - language: node_js
       node_js: node
       before_script: false