I'm sure I'm being dim, but is it possible to view the rendered output of a gist?
This is the gist I'm interested in: https://gist.github.com/844752/420cc52eb4910fe8fa2bec9e13daab18b6230503
Where can I see how it actually renders?
rawgit.com provides this service. To use rawgit.com, simply replace the domain of the raw view of the gist or github file you want to view with rawgit.com. For example:
https://gist.githubusercontent.com/mbostock/844752/raw/index.html
to
https://rawgit.com/mbostock/844752/raw/index.html
or
https://raw.githubusercontent.com/caffinatedmonkey/Hello-World-PSP/master/main.cpp
to
https://rawgit.com/caffinatedmonkey/Hello-World-PSP/master/main.cpp