v1.5.7/internal/terraform/testdata/plan-module-provider-var/main.tf - terraform - Git at Google

 variable "foo" {
   default = "bar"
 }

 module "child" {
   source = "./child"
   foo    = "${var.foo}"
 }
	variable "foo" {
	default = "bar"
	}

	module "child" {
	source = "./child"
	foo = "${var.foo}"
	}