[Fix #1808] Use &. where possible

app/views/layouts/_new_header.haml

@@ -1,3 +1,4 @@
+/ We can't use &. because the controller may not implement #nav_bar_profile
 - nav_bar_profile = controller.try(:nav_bar_profile)
 
 .new-header{ class: current_page?(root_path) ? nil : "new-header-with-border" }