anchor.diff:  <% end %>
   <% end %>
   
  -<%= link_to 'New project membership', new_project_project_membership_path(@project) if can? :new, ProjectMembership.new(project_id: @project.id) %>
  +<%= link_to 'Add new member', new_project_project_membership_path(@project) if can? :new, ProjectMembership.new(project_id: @project.id) %>
   <br>
   <br>
   
  
positive.code:     <% @project_memberships.each do |project_membership| %>
        <tr>
          <td><%= project_membership.user %></td>
          <td><%= link_to 'Show', [project_membership.project, project_membership] if can? :show, project_membership %></td>
          <td><%= link_to 'Destroy', [project_membership.project, project_membership], method: :delete, data: { confirm: 'Are you sure?' } if can? :destroy, project_membership %></td>
        </tr>
      <% end %>
    </tbody>
  
negative.code: <table>
    <thead>
      <tr>
        <th>Members</th>
        <th></th>
      </tr>
    </thead>
  