sidebar-actions.erb

Before:

<ul class="actions">
  <li><%= link_to content_tag(:span, 'Edit group'), edit_group_path(@group),  :class => 'btn' if current_user.group_admin?(@group) %></li>
  <li><%= link_to content_tag(:span, 'Start a new discussion'), new_group_discussion_path(@group),  :class => 'btn' if @group.public? || @group.members.include?(current_user) %></li>
  <li><%= link_to content_tag(:span, 'Start a shared document'), new_group_shared_document_path(@group), :class => 'btn' %></li>
  <li><%= link_to content_tag(:span, 'Invite users to join this group'), new_group_invitation_path(@group),  :class => 'btn' if  current_user.andand.group_admin?(@group) %></li>
</ul>

After:

<% sidebar_action_list do |list| %>
<%= list.action 'Edit group', edit_group_path(@group) if current_user.group_admin?(@group) %>
<%= list.action 'Start new discussion', new_group_discussion_path(@group) if @group.public? %>
<%= list.action 'Start a shared document', new_group_shared_document_path(@group) %>
<%= list.action 'Invite users to join this group', new_group_shared_document_path(@group) if current_user.andand.group_admin?(@group) %>
<% end %>