As I was getting ready to take an Emacs screenshot in the previous post, I figured I may want to redact email addresses before moving forward. I had a quick look for existing options and found redacted.el, built-in toggle-rot13-mode, and unpackaged/lorem-ipsum-overlay. All great options. I wanted a solution I could feed a single regular expression to obscure matches. I also wanted toggling capabilities, so I had a quick go at it… I also wanted the ability to redact the entire buffer content...