PEP-8 and style changes

You are free to leave it this way if you prefer, but I will attempt to persuade you that it's better to change to the 4 space indentation style any time that it wraps over 3 or more lines. When I need to wrap a line a second time, I adjust it to this style:

```
self.render_document_list(
    [document], filters=filters, order=order, spaces_between_cols=spaces_between_cols,
    indent=indent, step=step, omit_hidden=omit_hidden)
```

If you add more to it, it will take up less vertical space because it uses the horizontal space more efficiently.

All that said, this is valid PEP-8 so it is up to you!