doc: Show how to install Emacs, Guile, and Geiser.

* doc/contributing.texi (The Perfect Setup): Show "guix package -i"
command line.
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Ludovic Courtès 2019-02-03 18:35:51 +01:00
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@ -171,7 +171,11 @@ The Perfect Setup to hack on Guix is basically the perfect setup used
for Guile hacking (@pxref{Using Guile in Emacs,,, guile, Guile Reference
Manual}). First, you need more than an editor, you need
@url{http://www.gnu.org/software/emacs, Emacs}, empowered by the
wonderful @url{http://nongnu.org/geiser/, Geiser}.
wonderful @url{http://nongnu.org/geiser/, Geiser}. To set that up, run:
@example
guix package -i emacs guile emacs-geiser
@end example
Geiser allows for interactive and incremental development from within
Emacs: code compilation and evaluation from within buffers, access to