Dear <%= @user.name %> ,
<%= @text1 %>
<% unless @revision.folder %>
  <%= @text2 %> <%= url_for(:controller => 'dmsf', :action => 'show', :id => @revision.file.project, :only_path => false) %>.
<% else %>
  <%= @text2 %> <%= url_for(:controller => 'dmsf', :action => 'show', :id => @revision.file.project, :folder_id => @revision.folder, :only_path => false) %>.
<% end %>