Fixes file_field_tag docs by taking out deprecated end_form_tag and m…

…akes form_tag evaluated instead of output

actionpack/lib/action_view/helpers/form_tag_helper.rb

@@ -155,10 +155,10 @@ def hidden_field_tag(name, value = nil, options = {})
       # Creates a file upload field.  If you are using file uploads then you will also need
       # to set the multipart option for the form tag:
       #
-      #   <%= form_tag { :action => "post" }, { :multipart => true } %>
+      #   <% form_tag '/upload', :multipart => true do %>
       #     <label for="file">File to Upload</label> <%= file_field_tag "file" %>
       #     <%= submit_tag %>
-      #   <%= end_form_tag %>
+      #   <% end %>
       #
       # The specified URL will then be passed a File object containing the selected file, or if the field
       # was left blank, a StringIO object.