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Ruby

Treebook broken

I'm working through the treebook series and got to the part on installing devise and now my app is so broken it won't even let the webrick server start. This is the error I get:

C:\Ruby200\apps\mhs88book>rs C:/Ruby200/apps/mhs88book/config/application.rb:23:in <module:Mhs88book>': unde fined local variable or methodconfig' for Mhs88book:Module (NameError) from C:/Ruby200/apps/mhs88book/config/application.rb:9:in <top (require d)>' from C:/Ruby200/lib/ruby/gems/2.0.0/gems/railties-4.0.0/lib/rails/comman ds.rb:76:inrequire' from C:/Ruby200/lib/ruby/gems/2.0.0/gems/railties-4.0.0/lib/rails/comman ds.rb:76:in block in <top (required)>' from C:/Ruby200/lib/ruby/gems/2.0.0/gems/railties-4.0.0/lib/rails/comman ds.rb:73:intap' from C:/Ruby200/lib/ruby/gems/2.0.0/gems/railties-4.0.0/lib/rails/comman ds.rb:73:in <top (required)>' from bin/rails:4:inrequire' from bin/rails:4:in `<main>'

C:\Ruby200\apps\mhs88book>