feature: text() should optionally do something intelligent with whitespace

[flavorjones]

For example,

  Loofah.fragment("<div>foo</div><div>bar</div>").text
  => "foobar"

For block HTML elements, we should insert whitespace (maybe even newline), so that the desired output would be:

  foo bar

or

  foo
  bar

[ncancelliere]

I think most people are going to want whitespace. Given the nature of HTML blocks you'll always get an ugly result like "foobar" which isn't that useful while "foo bar" is probably what you intend to get when you grab html content.

[flavorjones]

commit d381674 adds #to_text to HTML::Document and HTML::DocumentFragment