documentcloud/closure-compiler — pull request #21 by rykov (2012-06-06 16:49:52+00:00)
Title: Use ECMAScript 5 by default

All modern browsers use ES5 as their standard, and it often causes confusion when Javascript files fail to compress, but work in the browser. I often run into this roadblock when using the Rails Asset Pipeline in development mode (no compression) vs precompiling (with compression).

This change makes ES5 the default compression.