identify: rename 'changed' keyword -> 'dirty' I meant to do this before sending the initial templater support, but forgot. I'm quite surprised that 'dirty' doesn't occur in more user facing contexts, but there are a few, like the help for blackbox. It also more obviously mirrors the '(clean)' state printed by the summary command. I also didn't like that it was just one letter off from {changes} in the {latesttags} sub-keywords, which has a totally different meaning.