refactor mailer custom content

app/views/submitter_mailer/_custom_content.html.erb

@@ -0,0 +1 @@
+<%= auto_link(simple_format(h(local_assigns[:content]))) %>

app/views/submitter_mailer/completed_email.html.erb

@@ -1,5 +1,5 @@
 <% if @email_config %>
-  <%= auto_link(simple_format(h(ReplaceEmailVariables.call(@email_config.value['body'], submitter: @submitter)))) %>
+  <%= render 'custom_content', content: ReplaceEmailVariables.call(@email_config.value['body'], submitter: @submitter) %>
 <% else %>
   <p>Hi there,</p>
   <p>"<%= @submitter.submission.template.name %>" form has been completed by <%= @submitter.submission.submitters.order(:completed_at).map { |e| e.name || e.email || e.phone }.join(', ') %>.</p>

app/views/submitter_mailer/documents_copy_email.html.erb

@@ -1,5 +1,5 @@
 <% if @email_config %>
-  <%= auto_link(simple_format(h(ReplaceEmailVariables.call(@email_config.value['body'], submitter: @submitter, sig: @sig)))) %>
+  <%= render 'custom_content', content: ReplaceEmailVariables.call(@email_config.value['body'], submitter: @submitter, sig: @sig) %>
 <% else %>
   <p>Hi there,</p>
   <p>Please check the copy of your "<%= @submitter.submission.template.name %>" submission in the email attachments.</p>

app/views/submitter_mailer/invitation_email.html.erb

@@ -1,6 +1,6 @@
 <% if @email_config || @body.present? %>
   <% body = (@body.presence || @email_config.value['body']).to_s %>
-  <%= auto_link(simple_format(h(ReplaceEmailVariables.call(body, submitter: @submitter)))) %>
+  <%= render 'custom_content', content: ReplaceEmailVariables.call(body, submitter: @submitter) %>
   <% if !body.include?(ReplaceEmailVariables::SUBMITTER_LINK) && !body.include?(ReplaceEmailVariables::SUBMITTER_ID) && !body.include?(ReplaceEmailVariables::SUBMISSION_LINK) && !body.include?(ReplaceEmailVariables::TEMPLATE_ID) && !@submitter.submission.source.in?(%w[api embed]) %>
     <p><%= link_to nil, submit_form_url(slug: @submitter.slug, t: SubmissionEvents.build_tracking_param(@submitter, 'click_email')) %></p>
   <% end %>