multiple nested engine failing on refinerycms 1.0.3

gistfile1.txt

refinerycms test-multiple-nested-engines
rails generate refinery_engine father name:string
bundle install 
rails generate refinerycms_fathers && rake db:migrate
rails generate refinery_engine son name:string fathers:engine
bundle install 
rails generate refinerycms_sons && rake db:migrate
rails generate refinery_engine daughter name:string fathers:engine
bundle install 
rails generate refinerycms_daughters

# gives this :
/usr/local/rvm/gems/ruby-1.9.2-p180@refinerycms/gems/bundler-1.0.15/lib/bundler/runtime.rb:68:in `require': /home/ada/rails_projects/test-multiple-nested-engines/vendor/engines/fathers/lib/refinerycms-fathers.rb:22: syntax error, unexpected tIDENTIFIER, expecting $end (SyntaxError)
...nerycms-sons', __FILE__)require File.expand_path('../refiner...
...                               ^
	from /usr/local/rvm/gems/ruby-1.9.2-p180@refinerycms/gems/bundler-1.0.15/lib/bundler/runtime.rb:68:in `block (2 levels) in require'
	from /usr/local/rvm/gems/ruby-1.9.2-p180@refinerycms/gems/bundler-1.0.15/lib/bundler/runtime.rb:66:in `each'
	from /usr/local/rvm/gems/ruby-1.9.2-p180@refinerycms/gems/bundler-1.0.15/lib/bundler/runtime.rb:66:in `block in require'
	from /usr/local/rvm/gems/ruby-1.9.2-p180@refinerycms/gems/bundler-1.0.15/lib/bundler/runtime.rb:55:in `each'
	from /usr/local/rvm/gems/ruby-1.9.2-p180@refinerycms/gems/bundler-1.0.15/lib/bundler/runtime.rb:55:in `require'
	from /usr/local/rvm/gems/ruby-1.9.2-p180@refinerycms/gems/bundler-1.0.15/lib/bundler.rb:120:in `require'
	from /home/ada/rails_projects/test-multiple-nested-engines/config/application.rb:7:in `<top (required)>'
	from /home/ada/rails_projects/test-multiple-nested-engines/vendor/ruby/1.9.1/gems/railties-3.0.9/lib/rails/commands.rb:15:in `require'
	from /home/ada/rails_projects/test-multiple-nested-engines/vendor/ruby/1.9.1/gems/railties-3.0.9/lib/rails/commands.rb:15:in `<top (required)>'
	from script/rails:6:in `require'
	from script/rails:6:in `<main>'