The tutorial is available here: http://viewsourcecode.org/snaptoken/kilo
It is a static HTML site, and you can download your own local copy from here: https://github.com/snaptoken/kilo-tutorial/releases
See the appendices for more information about the tutorial itself, including how to contribute.
The kilo source code contained in steps.diff was
originally written by Salvatore Sanfilippo
(aka antirez) and released under the BSD 2-clause
license (see steps.diff.LICENSE). I've made a few minor changes to the
original code.
All other files in this repository are licensed under CC BY 4.0.