Remove Interpolation-only expressions from website/docs files (#36065)

* Remove Interpolation-only expressions from website/docs files

Interpolation-only expressions are deprecated in Terraform v0.12.14
See. https://github.com/terraform-linters/tflint-ruleset-terraform/blob/v0.10.0/docs/rules/terraform_deprecated_interpolation.md

* Revert whitespace trimming at the end of lines

* Preserve interpolation-only expressions for JSON

* Preserve interpolation-only expressions for < 0.11 samples

* Remove Interpolation-only expressions from website/docs files

website/docs/cli/commands/import.mdx

@@ -108,8 +108,8 @@ variable "access_key" {}
 variable "secret_key" {}
 
 provider "aws" {
-  access_key = "${var.access_key}"
-  secret_key = "${var.secret_key}"
+  access_key = var.access_key
+  secret_key = var.secret_key
 }
 ```
 

website/docs/language/backend/s3.mdx

@@ -454,7 +454,7 @@ provider "aws" {
   # environment or the global credentials file.
 
   assume_role = {
-    role_arn = "${var.workspace_iam_roles[terraform.workspace]}"
+    role_arn = var.workspace_iam_roles[terraform.workspace]
   }
 }
 ```

website/docs/language/expressions/dynamic-blocks.mdx

@@ -30,7 +30,7 @@ special `dynamic` block type, which is supported inside `resource`, `data`,
 ```hcl
 resource "aws_elastic_beanstalk_environment" "tfenvtest" {
   name                = "tf-test-name"
-  application         = "${aws_elastic_beanstalk_application.tftest.name}"
+  application         = aws_elastic_beanstalk_application.tftest.name
   solution_stack_name = "64bit Amazon Linux 2018.03 v2.11.4 running Go 1.12.6"
 
   dynamic "setting" {

website/docs/language/modules/develop/providers.mdx

@@ -334,7 +334,7 @@ provider "aws" {
 
 provider "google" {
   alias       = "usw1"
-  credentials = "${file("account.json")}"
+  credentials = file("account.json")
   project     = "my-project-id"
   region      = "us-west1"
   zone        = "us-west1-a"
@@ -342,7 +342,7 @@ provider "google" {
 
 provider "google" {
   alias       = "usw2"
-  credentials = "${file("account.json")}"
+  credentials = file("account.json")
   project     = "my-project-id"
   region      = "us-west2"
   zone        = "us-west2-a"

website/docs/language/resources/provisioners/connection.mdx

@@ -59,8 +59,8 @@ provisioner "file" {
   connection {
     type     = "ssh"
     user     = "root"
-    password = "${var.root_password}"
-    host     = "${var.host}"
+    password = var.root_password
+    host     = var.host
   }
 }
 
@@ -72,8 +72,8 @@ provisioner "file" {
   connection {
     type     = "winrm"
     user     = "Administrator"
-    password = "${var.admin_password}"
-    host     = "${var.host}"
+    password = var.admin_password
+    host     = var.host
   }
 }
 ```

website/docs/language/state/workspaces.mdx

@@ -53,7 +53,7 @@ to spin up smaller cluster sizes. For example:
 
 ```hcl
 resource "aws_instance" "example" {
-  count = "${terraform.workspace == "default" ? 5 : 1}"
+  count = terraform.workspace == "default" ? 5 : 1
 
   # ... other arguments
 }