[DiapDealer]

HTML Tidy is for people who don't care about what the code looks like. They only care how it renders.

It's alright to hate it and not want to use it, but it's important to remember that it often serves the WYSIWYG users of Sigil quite admirably. I'm not one of those users, mind you. I'm just aware (and tolerant) of the fact that WYSYWIG and automatic code generation features often come at the cost of control over what the underlying markup looks like. Nature of the beast. You want stuff done for you: you lose a little control over how it's done.