Depends on the editor, of course, but e.g. https://www.emacswiki.org/emacs/redshift-indent.el https://www.emacswiki.org/emacs/redshift-indent.el (Haven't trie

Depends on the editor, of course, but e.g. https://www.emacswiki.org/emacs/redshift-indent.el https://www.emacswiki.org/emacs/redshift-indent.el (Haven't tried the above, but I've done fairly extensive display hacks with emacs in the distant past, so I have a fair amount of confidence that it's not hard).