app/views/rapidfire/answers/_radio.html.erb
<%= render partial: "rapidfire/answers/errors", locals: {answer: answer} %>
<div class="form-group">
<%= f.label :answer_text, answer.question.question_text.html_safe %>
<%- answer.question.options.each_with_index do |option, index| %>
<span class="form-group sub">
<%= f.label "answer_text_#{index}" do %>
<%= f.radio_button :answer_text, option, id: "#{f.object_name.gsub(/\]\[|[^-a-zA-Z0-9:.]/, "_").sub(/_$/, "")}_answer_text_#{index}" %>
<%= option %>
<% end %>
</span>
<% end %>
</div>