mishoo/UglifyJS2 — pull request #41 by Skalman (2012-11-11 18:26:09+00:00)
Title: Convert x.toString() to ""+x instead of x+""

In some places this can save one byte in whitespace, e.g. after return.
Example:

```javascript
function f(arg) {
// return""+arg - no space between return and ""
return arg.toString();
}
```