The Texinfo format, using the in-Emacs Info browser. Yes, it means you only read your documentation inside Emacs, but it's hands-down the best doc-browsing expe

The Texinfo format, using the in-Emacs Info browser. Yes, it means you only read your documentation inside Emacs, but it's hands-down the best doc-browsing experience I've ever had. Hell to write, butter to read.