Option docs doesn't have the correct default values

Shouldn't the doc's defaults match these values?

```
    // Merge task-specific and/or target-specific options with these defaults.
    var options = this.options({
      indent: 2,
      indent_char: " ",
      indent_inner_html: true,
      indent_scripts: "keep",
      brace_style: "expand",
      preserve_newline: false,
      max_preserve_newline: 0,
      wrap_line_length: 0
    });
```
https://github.com/jonschlinkert/grunt-prettify/blob/master/tasks/prettify.js#L20