Model.find_by_alias() generates invalid Ruby code

[sunaku]

Column names should be sanitized (e.g. by appending an underscore) before they are used as Ruby variable names in generated find_by_* method bodies so that they don't get misinterpreted as Ruby keywords:

>> User.find_by_alias("chuck")
SyntaxError: /home/skurapati/.rvm/gems/ruby-2.0.0-p247/gems/activerecord-4.0.2/lib/active_record/dynamic_matchers.rb:65: syntax error, unexpected keyword_alias, expecting ')'
          def self.find_by_alias(alias, options = {})
                                      ^
/home/skurapati/.rvm/gems/ruby-2.0.0-p247/gems/activerecord-4.0.2/lib/active_record/dynamic_matchers.rb:65: syntax error, unexpected ')', expecting end-of-input
        from /home/skurapati/.rvm/gems/ruby-2.0.0-p247/gems/activerecord-4.0.2/lib/active_record/dynamic_matchers.rb:64:in `class_eval'
        from /home/skurapati/.rvm/gems/ruby-2.0.0-p247/gems/activerecord-4.0.2/lib/active_record/dynamic_matchers.rb:64:in `define'
        from /home/skurapati/.rvm/gems/ruby-2.0.0-p247/gems/activerecord-4.0.2/lib/active_record/dynamic_matchers.rb:19:in `method_missing'

Thanks for your consideration.