Redmine/app/views/watchers/_watchers.html.erb

<div class="contextual">
<%= link_to_remote l(:button_add),
                   :url => {:controller => 'watchers',
                            :action => 'new',
                            :object_type => watched.class.name.underscore,
                            :object_id => watched} if User.current.allowed_to?(:add_issue_watchers, @project) %>
</div>

<h3><%= l(:label_issue_watchers) %> (<%= watched.watcher_users.size %>)</h3>

<% unless @watcher.nil? %>
	<% remote_form_for(:watcher, @watcher,
                	   :url => {:controller => 'watchers',
              	              :action => 'new',
            	                :object_type => watched.class.name.underscore,
         	                    :object_id => watched},
       	             :method => :post,
      	             :html => {:id => 'new-watcher-form'}) do |f| %>
		<p><%= f.select :user_id, (watched.addable_watcher_users.collect {|m| [m.name, m.id]}), :prompt => "--- #{l(:actionview_instancetag_blank_option)} ---" %>

		<%= submit_tag l(:button_add) %>
		<%= toggle_link l(:button_cancel), 'new-watcher-form'%></p>
	<% end %>
<% end %>

<%= watchers_list(watched) %>