Fix styles for poll dates

We accidentally introduced a typo in commit f497227e3 which caused the
dates to be rendered outside the element where the dates styles are
applied.

app/components/polls/poll_component.html.erb

@@ -27,13 +27,12 @@
       </div>
     </div>
     <div class="small-12 medium-6 column" data-equalizer-watch>
-      <div class="dates"></div>
       <% if poll.questions.one? %>
         <h4><%= link_to_poll poll.questions.first.title, poll %></h4>
-        <%= dates %>
+        <div class="dates"><%= dates %></div>
       <% else %>
         <h4><%= link_to_poll poll.name, poll %></h4>
-        <%= dates %>
+        <div class="dates"><%= dates %></div>
 
         <ul class="margin-top">
           <% poll.questions.sort_for_list.each do |question| %>

spec/components/polls/poll_component_spec.rb

@@ -42,6 +42,14 @@ describe Polls::PollComponent do
     end
   end
 
+  it "renders the dates inside an HTML tag" do
+    poll = create(:poll, starts_at: "2015-07-15", ends_at: "2015-07-22")
+
+    render_inline Polls::PollComponent.new(poll)
+
+    expect(page).to have_css ".dates", exact_text: "From 2015-07-15 to 2015-07-22"
+  end
+
   it "shows a link to poll stats if enabled" do
     poll = create(:poll, :expired, name: "Poll with stats", stats_enabled: true)