Terraform format fixes

- Adds pre-commit terraform hooks:
  - terraform fmt
  - terraform-docs

Will be automatically run on every commit

.pre-commit-config.yaml

@@ -0,0 +1,6 @@
+repos:
+- repo: git://github.com/antonbabenko/pre-commit-terraform
+  rev: v1.31.0
+  hooks:
+    - id: terraform_fmt
+    - id: terraform_docs

example/main.tf

@@ -18,7 +18,7 @@ data "aws_subnet" "default" {
 }
 
 data "aws_route53_zone" "selected" {
-  name         = "qndesign.studio"
+  name = "qndesign.studio"
 }
 
 data "aws_region" "current" {}
@@ -30,12 +30,12 @@ module "es-cluster" {
 
   name                      = "example"
   vpc_id                    = "${data.aws_vpc.default.id}"
-  subnet_ids                = [ "${data.aws_subnet.default.0.id}", "${data.aws_subnet.default.1.id}" ]
+  subnet_ids                = ["${data.aws_subnet.default.0.id}", "${data.aws_subnet.default.1.id}"]
   zone_id                   = "${data.aws_route53_zone.selected.zone_id}"
   itype                     = "m4.large.elasticsearch"
   icount                    = 2
   zone_awareness            = true
-  ingress_allow_cidr_blocks = [ "${data.aws_vpc.default.cidr_block}" ]
+  ingress_allow_cidr_blocks = ["${data.aws_vpc.default.cidr_block}"]
   access_policies           = <<CONFIG
 {   
     "Version": "2012-10-17",

main.tf

@@ -63,7 +63,7 @@ resource "aws_elasticsearch_domain" "es" {
     dedicated_master_count   = var.mcount
     zone_awareness_enabled   = var.zone_awareness
     zone_awareness_config {
-       availability_zone_count = length(var.subnet_ids) > 2 ? 3 : 2
+      availability_zone_count = length(var.subnet_ids) > 2 ? 3 : 2
     }
   }
 
@@ -101,7 +101,7 @@ resource "aws_elasticsearch_domain" "es" {
 
 # Add ALB record on DNS
 resource "aws_route53_record" "main" {
-  count = length(var.zone_id) > 0 ? 1 : 0
+  count   = length(var.zone_id) > 0 ? 1 : 0
   zone_id = var.zone_id
   name    = var.name
   type    = "CNAME"

outputs.tf

@@ -19,7 +19,7 @@ output "es_endpoint" {
 }
 
 output "es_kibana_endpoint" {
-  description = "Domain-specific endpoint for kibana without https scheme." 
+  description = "Domain-specific endpoint for kibana without https scheme."
   value       = "${aws_elasticsearch_domain.es.kibana_endpoint}"
 }
 

variables.tf

@@ -17,7 +17,7 @@ variable "vpc_id" {
 // Optional
 variable "create_iam_service_linked_role" {
   description = "Control the creation of the default service role, set it to false if you have already created it"
-  default = true
+  default     = true
 }
 
 variable "zone_id" {