Teddy should remove whitespace created when indenting/formatting Teddy tags

[alallier]

This can create unexpected whitespace when you do something like this for example

<textarea>
  <if something>
    Some text here
  </if>
</textarea>

This will render a text area with 4 spaces and then the Some text here because it renders the spaces due to the if statement in this case.

[kethinov]

I think the solution here is to trim the beginning and end of the string with respect to the parent element.

[kethinov]

It may not be posible to fix this elegantly because it would require automatically trimming whitespace before and after the text within the <textarea> which could lead to lots of hacky consequences. Teddy 0.4.x did some of this and wasn't a great road to go down. Might be better to have people just do stuff like <textarea>{content}</textarea> where {content} is defined by the backend before it gets to the template.