<div class='row'>
  <div class="one-half column">
    <h4><%= @proposal.title %>,
      by <%= link_to @proposal.speaker.name, speaker_path(@proposal.speaker) %>
      <div class="tags">
       <% @proposal.tag_list.each do |tag| %>
         <span class="tag">#<%= tag %></span>
       <% end %>
      </div>
    </h4>

    <p><%= markdown(@proposal.body) %></p>
    <p>
    <%= link_to 'Edit proposal', edit_proposal_path(@proposal) %>
    </p>
  </div>

  <div class="one-half column">
    <h4>Submissions </h4>
    <% @proposal.submissions.each do |submission| %>
      <p>
      <%= link_to submission.event_instance.name_and_year, submission.event_instance %> -
      <%= submission.result.capitalize %>
      <%= link_to '[Edit]', edit_submission_path(submission), id: 'edit-submission' %>
      </p>
    <% end %>
    <%= link_to 'Add submission', new_submission_path(proposal: @proposal.id) %>
  </div>
</div>

<div class='row'>
  <div class="one-half column">
    <h4><%= @proposal.title %>,
      by <%= link_to @proposal.speaker.name, speaker_path(@proposal.speaker) %>
      <div class="tags">
       <% @proposal.tag_list.each do |tag| %>
         <span class="tag">#<%= tag.gsub(" ", "") %></span>
       <% end %>
      </div>
    </h4>

    <p><%= markdown(@proposal.body) %></p>
    <p>
    <%= link_to 'Edit proposal', edit_proposal_path(@proposal) %>
    </p>
  </div>

  <div class="one-half column">
    <h4>Submissions </h4>
    <% @proposal.submissions.each do |submission| %>
      <p>
      <%= link_to submission.event_instance.name_and_year, submission.event_instance %> -
      <%= submission.result.capitalize %>
      <%= link_to '[Edit]', edit_submission_path(submission), id: 'edit-submission' %>
      </p>
    <% end %>
    <%= link_to 'Add submission', new_submission_path(proposal: @proposal.id) %>
  </div>
</div>

Remove all whitespace from tags with multiple words
Remove all whitespace from tags with multiple words
