ignore trailing commas when inferring newlines - fixes #1304

test/core/fixtures/transformation/es6.properties.computed/two/expected.js

@@ -1,4 +1,5 @@
 "use strict";
 
 var obj = babelHelpers.defineProperty({
-  first: "first" }, "second", "second");
+  first: "first"
+}, "second", "second");

test/core/fixtures/transformation/spec.proto-to-assign/object-literal/expected.js

@@ -5,7 +5,8 @@ var _extends = Object.assign || function (target) { for (var i = 1; i < argument
 var foo = _extends({}, bar);
 
 var foo = _extends({}, bar, {
-  bar: "foo" });
+  bar: "foo"
+});
 
 var foo = _extends({}, bar, {
   bar: "foo"