docs menu example crashing -- undefined local var 'dir'

[joenorton]

When I open a xiki enabled text editor, where other commands are working, and I run: docs and then click around, I ran into this error:

    undefined local variable or method `dir' for Xiki::DirHandler:Class
    /Users/joenorton/xiki/lib/xiki/handlers/dir_handler.rb:12:in `handle'
    /Users/joenorton/xiki/lib/xiki/core/menu.rb:1170:in `block in handle'

Here is the full output: https://gist.github.com/joenorton/639221efab83ad505add