The documentation is written in almost plain html. There are a few things to know since you are viewing this documentation in a web browser instead of using Solfege:
<script type="text/solfegescript">
that will be ignored by the web browser. At the moment the only use
of the scripting is to query Solfege about key bindings. So when viewing in
a web browser you will see the default key bindings, but from inside
Solfege, the documentation will be updated to whatever the user has
configured the program.