<p>Team members</p>
<ul class="team">
  <% ([@submission.user] + @submission.team_members).each do |member| %>
    <li>
      <%= link_to user_photo_image_tag(member, :small, :class => "user_photo", :title => member.full_name),
        "http://#{home_url}/users/#{member.full_name}", :title => member.full_name %>
    </li>
  <% end %>
</ul>
<p>by</p>
<ul class="team">
  <% ([@submission.user] + @submission.team_members).each do |member| %>
    <li>
      <%= link_to user_photo_image_tag(member, :small, :class => "user_photo", :title => member.full_name),
        "http://#{home_url}/users/#{member.full_name}", :title => member.full_name %>
    </li>
  <% end %>
</ul>

Replace "Team members" with "by"
Replace "Team members" with "by"
