esperando tASSOC en un archivo de Rails

Question

Estoy seguro de que he hecho algo estúpido aquí, pero simplemente no puedo verlo.

Llamo al método breadcrumb en la vista de la aplicación.

app/helpers/breadcrumbs_helper.rb dice:

module BreadcrumbsHelper 

    def breadcrumb 
    @crumb_list = [] 
    drominay_crumb_builder 
    project_crumb_builder 
    content_tag(:div, :id => "breadcrumbs", @crumb_list.map { |list_item| crumb_builder(list_item) }) 
    end 

    def crumb_builder(list_item) 
    if list_item == @crumb_list.last 
     content_tag(:span, list_item['body'], :class => list_item['crumb']) 
    else 
     body = ["list_item['body']", " → "].join 
     link_to(body, list_item['url'], :class => list_item['crumb']) 
    end 
    end 

    def drominay_crumb_builder 
    list_item = Hash.new 
    list_item['body'] = "Drominay" 
    list_item['url'] = "root" 
    @crumb_list << list_item 
    end 

    def project_crumb_builder 
    end 

end 

Por qué oh por qué estoy recibiendo este error "esperando Tassoc"? (¿Y qué es un tASSOC de todos modos?)

steven-nobles-imac-200:drominay steven$ script/server 
=> Booting Mongrel (use 'script/server webrick' to force WEBrick) 
=> Rails 2.2.2 application starting on http://0.0.0.0:3000 
=> Call with -d to detach 
=> Ctrl-C to shutdown server 
** Starting Mongrel listening at 0.0.0.0:3000 
** Starting Rails with development environment... 
Exiting 
/Library/Ruby/Site/1.8/rubygems/custom_require.rb:31:in `gem_original_require': /Users/steven/Drominay/app/helpers/breadcrumbs_helper.rb:7: syntax error, unexpected ')', expecting tASSOC (SyntaxError) 
/Users/steven/Drominay/app/helpers/breadcrumbs_helper.rb:29: syntax error, unexpected $end, expecting kEND 
from /Library/Ruby/Site/1.8/rubygems/custom_require.rb:31:in `require' 
from /Library/Ruby/Gems/1.8/gems/activesupport-2.2.2/lib/active_support/dependencies.rb:153:in `require' 
from /Library/Ruby/Gems/1.8/gems/activesupport-2.2.2/lib/active_support/dependencies.rb:521:in `new_constants_in' 
from /Library/Ruby/Gems/1.8/gems/activesupport-2.2.2/lib/active_support/dependencies.rb:153:in `require' 
from /Users/steven/Drominay/app/helpers/application_helper.rb:5 
from /Library/Ruby/Gems/1.8/gems/activesupport-2.2.2/lib/active_support/dependencies.rb:382:in `load_without_new_constant_marking' 
from /Library/Ruby/Gems/1.8/gems/activesupport-2.2.2/lib/active_support/dependencies.rb:382:in `load_file' 
from /Library/Ruby/Gems/1.8/gems/activesupport-2.2.2/lib/active_support/dependencies.rb:521:in `new_constants_in' 
    ... 56 levels... 
from /Users/steven/.gem/ruby/1.8/gems/rails-2.2.2/lib/commands/server.rb:49 
from /Library/Ruby/Site/1.8/rubygems/custom_require.rb:31:in `gem_original_require' 
from /Library/Ruby/Site/1.8/rubygems/custom_require.rb:31:in `require' 
from script/server:3 

Answer 1

tASSOC significa el => operador

Answer 2

Fue porque tenía los argumentos para content_tag en el orden incorrecto.

Todavía estoy interesado en saber qué es un tASSOC.