Escaping double quotes in strings

Terraform
1 
locals {
  cdt_addresses  = [for sites in var.cdt_sites : toset("\"${sites.address}\", \"www.${var.cdt_env_url_prefix}${sites.address}\", \"${var.cdt_env_url_prefix}${sites.address}\"")]
}


output "cdt_addresses" {
    value = local.cdt_addresses
}


resource "aws_lb_listener_rule" "cdt-apache" {
  for_each = local.cdt_addresses

  listener_arn = aws_lb_listener.alb_https.arn
  action {
    type             = "forward"
    target_group_arn = aws_lb_target_group.cdt_apache_tg.arn
  }
  condition {
    host_header {
      values = ["${each.key}"]
    }
  }
}

I would expect the output to look like this:

cdt_addresses = [
      + ""somesite.com", "www.somesite.com", "prod.somesite.com"",
      + ""someothersite.com", "www.someothersite.com", "prod.someothersite.com"",
    ]

Instead I get:

cdt_addresses = [
      + "\"somesite.com\", \"www.somesite.com\", \"prod.somesite.com\"",
      + "\"someothersite.com\", \"www.someothersite.com\", \"prod.someothersite.com\"",
    ]

I have also tried triple backslashes too.

What am I missing here?

2

The output is a quoted string, so the double quotes within the string need to be escaped. The output is correct, and internally there are no backslashes in the string.