Enable rustfmt tests

This reverts commit d73a953db7.

.travis.yml

@@ -22,7 +22,7 @@ env:
 install:
   - |
     if [ -z ${INTEGRATION} ]; then
-      # rustup component add rustfmt || cargo install --git https://github.com/rust-lang/rustfmt/ --force
+      rustup component add rustfmt || cargo install --git https://github.com/rust-lang/rustfmt/ --force
       if [ "$TRAVIS_OS_NAME" == "linux" ]; then
         . $HOME/.nvm/nvm.sh
         nvm install stable

appveyor.yml

@@ -22,7 +22,7 @@ install:
     - del rust-toolchain
     - cargo install rustup-toolchain-install-master --debug || echo "rustup-toolchain-install-master already installed"
     - rustup-toolchain-install-master %RUSTC_HASH% -f -n master
-    #- rustup component add rustfmt --toolchain nightly
+    - rustup component add rustfmt --toolchain nightly
     - rustup default master
     - set PATH=%PATH%;C:\Users\appveyor\.rustup\toolchains\master\bin
     - rustc -V

tests/fmt.rs

@@ -1,7 +1,6 @@
 use std::process::Command;
 
 #[test]
-#[ignore]
 fn fmt() {
     if option_env!("RUSTC_TEST_SUITE").is_some() {
         return;