<% if notification.type_of == 'recent_changes' %>
<%= image_tag avatar_path(notification.generator_user, :icon_small), class: 'avatar img-circle' %>
<% end %>
<% if notification.type_of == 'assignment' %>
<%= fa_icon 'newspaper-o' %>
<% end %>
<% if notification.type_of == 'system_message' %>
<% end %>