View source for Emacs mode

* Download [https://raw.githubusercontent.com/spechub/Hets/f93990c928a2b0b8f970b86d0fbd18d604147af6/utils/el/dol-mode.el dol-mode.el] and [https://raw.githubusercontent.com/spechub/Hets/f93990c928a2b0b8f970b86d0fbd18d604147af6/utils/el/dol.el dol.el] and save them locally (e.g. in .emacs.d, or elsehwere)
* in the .emacs file in your home folder, add
  (load-file "<path-to>/dol.el")