don't output comma separator for decorator list and output Property decorators - fixes #1811

test/core/fixtures/generation/types/Decorator/actual.js

@@ -0,0 +1,31 @@
+var obj = {
+  @foo
+  @bar
+  foo: "bar",
+
+  @foo
+  @bar
+  foo() {},
+
+  @foo
+  get foo() {},
+
+  @bar
+  set bar(foo) {}
+};
+
+class Foo {
+  @foo
+  @bar
+  foo() {}
+
+  @foo
+  @bar
+  foo() {}
+
+  @foo
+  get foo() {}
+
+  @bar
+  set bar(foo) {}
+}

test/core/fixtures/generation/types/Decorator/expected.js

@@ -0,0 +1,31 @@
+var obj = {
+  @foo
+  @bar
+  foo: "bar",
+
+  @foo
+  @bar
+  foo() {},
+
+  @foo
+  get foo() {},
+
+  @bar
+  set bar(foo) {}
+};
+
+class Foo {
+  @foo
+  @bar
+  foo() {}
+
+  @foo
+  @bar
+  foo() {}
+
+  @foo
+  get foo() {}
+
+  @bar
+  set bar(foo) {}
+}

test/core/generation.js

@@ -32,6 +32,7 @@ _.each(helper.get("generation"), function (testSuite) {
           strictMode: false,
           sourceType: "module",
           features: {
+            "es7.decorators": true,
             "es7.comprehensions": true,
             "es7.asyncFunctions": true,
             "es7.exportExtensions": true,