Redirecting back to github

[Naatan]

Omnigollum redirects back to github after authentication. I've traced the issue down to this line:

https://github.com/arr2036/omnigollum/blob/master/lib/omnigollum.rb#L52

If I simply change it to '/' the problem goes away, but ideally redirects should go back to the page the user started the authentication process from.

[ghost]

The documentation should be updated, I had this issue too.
Set your callback path registered with github to /__omnigollum__/auth/github/callback. So, your callback uri should look like (changing for your own hostname):
http://wiki.lan/__omnigollum__/auth/github/callback