Merge pull request #671 from pvomelveny/master

Set ignoreResponseCode to true in yapf.coffee

src/beautifiers/yapf.coffee

@@ -17,6 +17,9 @@ module.exports = class Yapf extends Beautifier
     @run("yapf", [
       ["--style=pep8"]
       @tempFile("input", text)
-      ], help: {
+      ], {
-        link: "https://github.com/google/yapf"
+        ignoreReturnCode: true,
+        help: {
+          link: "https://github.com/google/yapf"
+        }
       })