Best way to use html5 data attributes with rails content_tag helper?

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Rails 3.1 ships with built-in helpers:

http://api.rubyonrails.org/classes/ActionView/Helpers/TagHelper.html#method-i-tag

E.g.,

tag("div", :data => {:name => 'Stephen', :city_state => %w(Chicago IL)})
# => <div data-name="Stephen" data-city-state="[&quot;Chicago&quot;,&quot;IL&quot;]" />

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