Yes, you can do that, but you need to call html_safe
on your string (if the string is generated by Rails)
link_to 'Q', '#', :title => "Quality", :rel => 'popover', "data-content" => "Did they do a good job? <ol><li> for Really Nice </li><li>...</li></ol>".html_safe }
You need to create a popover instance that has the html
option enabled (place this in your javascript file after the popover JS code):
$('.popover-with-html').popover({ html : true });
Then the link syntax would be:
<%= link_to('Q', '#', :class => "popover-with-html", :title => "Quality", "data-content" => "#{some_content_object.html_safe}") %>
If you're dynamically generating the content, then you need to use html_safe
like David suggested so Rails doesn't escape the HTML code. Otherwise, you can just place HTML directly within that content attribute.