app/views/devise/confirmations/new.html.haml
%h2 Resend confirmation instructions
= simple_form_for(resource, as: resource_name, url: confirmation_path(resource_name), html: { method: :post }) do |f|
= f.error_notification
.inputs
= f.input :email, required: true
.actions
= f.button :submit, "Resend confirmation instructions"
= render partial: "devise/shared/links"