GNU Emacs is a free and open-source, extensible and self-documenting text editor written in C and its own dialect of the Lisp programming language, Emacs Lisp. It was originally developed by Richard Stallman, the founder of the GNU Project, and Guy L. Steele Jr. Its initial release was in 1985 and has been ported to virtually every major operating system, including the BSDs, Linux, macOS and Windows. As its name suggests it is developed as part of the GNU Project. It is extended using plugins written in Emacs Lisp and is in the official repositories of Fedora. It can also be run on Fedora using an AppImage.
To install GNU Emacs on Fedora with DNF, merely run:
$ sudo dnf install emacs
A list of GNU Emacs-related packages in the official repositories of Fedora can be found by running:
$ dnf search emacs | grep "noarch" | grep -v "xemacs"
In order to enable RPM spec file syntax-highlighting install the
emacs-rpm-spec-mode package with DNF. To do this run:
$ sudo dnf install emacs-rpm-spec-mode
$ denotes a user console, as opposed to a root console).
GNU Emacs installed via DNF had a bug on Fedora 25 (at least, whether this bug exists on newer versions of Fedora is uncertain) that made it challenging to assign custom syntax-highlighting to a given file extension, the details of which can be found here. User:Fusion809's AppImages did not have this same bug.