calling html_safe method in alerts and notices messages

app/views/layouts/application.html.erb

@@ -17,7 +17,7 @@
       <div class="alert alert-info" role="alert">
         <button type="button" class="close" data-dismiss="alert" aria-label="Fechar">
           <span aria-hidden="true">&times;</span></button>
-        <%= notice %>
+        <%= notice.html_safe %>
       </div>
   <% end %>
 
@@ -25,7 +25,7 @@
       <div class="alert alert-danger alert-dismissible" role="alert">
         <button type="button" class="close" data-dismiss="alert" aria-label="Fechar">
           <span aria-hidden="true">&times;</span></button>
-        <%= alert %>
+        <%= alert.html_safe %>
       </div>
   <% end %>