Added rustfmt to appveyor

Alan Jeffrey · Alan Jeffrey · commit 5e07c7e16c24 · 2018-06-20T12:11:36.000-05:00
diff --git a/appveyor.yml b/appveyor.yml
@@ -51,6 +51,7 @@ install:
   - set AUTOCONF=C:/mozilla-build/msys/local/bin/autoconf-2.13
   - rustc -vV
   - cargo -vV
+  - cargo install rustfmt-nightly --root C:\rust
 
 build_script:
   - echo PATH %PATH%
