fix: Render special chars in variables' default value properly (#284)

* Fix: No longer crashes when there are special chars in a variable default

* Do not escape chars everywhere

* Cleanup go.mod

examples/variables.tf

@@ -6,7 +6,7 @@ variable "bool-3" {
 
 variable "bool-2" {
   description = "It's bool number two."
-  default = false
+  default     = false
 }
 
 // It's bool number one.
@@ -28,6 +28,10 @@ variable "string-1" {
   default = "bar"
 }
 
+variable "string-special-chars" {
+  default = "\\.<>[]{}_-"
+}
+
 variable "number-3" {
   type    = number
   default = "19"
@@ -102,7 +106,7 @@ default     = [
 ]
 ```
 EOD
-  default     = [
+  default = [
     "name rack:location"
   ]
 }
@@ -156,7 +160,7 @@ variable "string_default_null" {
 }
 
 variable "string_no_default" {
-  type    = string
+  type = string
 }
 
 variable "number_default_zero" {