tf 12-ize sns-email-topic module

monitoring/sns-email-topic/main.tf

@@ -1,23 +1,23 @@
 data "template_file" "endpoints" {
-  template = "${file("${path.module}/files/email-endpoint-list.json.tpl")}"
-  count    = "${length(var.sns_emails)}"
+  template = file("${path.module}/files/email-endpoint-list.json.tpl")
+  count    = length(var.sns_emails)
 
   vars = {
-    email_address = "${element(var.sns_emails, count.index)}"
+    email_address = element(var.sns_emails, count.index)
   }
 }
 
 data "template_file" "sns_stack" {
-  template = "${file("${path.module}/files/email-sns-stack.json.tpl")}"
+  template = file("${path.module}/files/email-sns-stack.json.tpl")
 
   vars = {
-    endpoints    = "${join(",", data.template_file.endpoints.*.rendered)}"
+    endpoints    = join(",", data.template_file.endpoints.*.rendered)
     display_name = "${var.prefix}-sns-email"
   }
 }
 
 resource "aws_cloudformation_stack" "sns_stack" {
   name          = "${var.prefix}-sns-email"
-  template_body = "${data.template_file.sns_stack.rendered}"
+  template_body = data.template_file.sns_stack.rendered
   tags          = var.tags
 }