heroku/heroku — pull request #336 by tonydaly (2012-05-28 13:20:51+00:00)
Title: Client command requires a symbol rather than a string

https://github.com/heroku/heroku/blob/master/lib/heroku/client.rb#L513

The logic to turn the maintenance page on or off is determined by equality against a symbol. However, a string was been passed to this method which was always causing `mode` to evaluate to `0` causing every maintenance call to turn the maintenance page off.

This fixes issue #355.