Merge pull request #4989 from plataformatec/mf-fix-unclosed-tag-error-messages-partial

Fix unclosed html tag and add deprecation warn

app/helpers/devise_helper.rb

@@ -4,6 +4,13 @@ module DeviseHelper
   # Retain this method for backwards compatibility, deprecated in favour of modifying the
   # devise/shared/error_messages partial
   def devise_error_messages!
+    ActiveSupport::Deprecation.warn <<-DEPRECATION.strip_heredoc
+      [Devise] `DeviseHelper.devise_error_messages!`
+      is deprecated and it will be removed in the next major version.
+      To customize the errors styles please run `rails g devise:views` and modify the
+      `devise/shared/error_messages` partial.
+    DEPRECATION
+
     return "" if resource.errors.empty?
 
     render "devise/shared/error_messages", resource: resource

app/views/devise/shared/_error_messages.html.erb

@@ -8,7 +8,7 @@
     </h2>
     <ul>
       <% resource.errors.full_messages.each do |message| %>
-        <li><%= message %>
+        <li><%= message %></li>
       <% end %>
     </ul>
   </div>