Completely escape non-expr strings

_tests/escaped-strings.hcl

@@ -1,2 +1,2 @@
 EscapedString  = "\n\t\r\\\""
-TemplateString = "\n\t\r\\\" ${"\\ \""}"
+TemplateString = "test-A${"\\ \""}"

go.mod

@@ -6,5 +6,5 @@ require (
 	github.com/hashicorp/hcl v1.0.0
 	github.com/hashicorp/hcl/v2 v2.11.1
 	github.com/stretchr/testify v1.6.1
-	github.com/zclconf/go-cty v1.8.0 // indirect
+	github.com/zclconf/go-cty v1.8.0
 )

hclencoder_test.go

@@ -68,10 +68,10 @@ func TestEncoder(t *testing.T) {
 			ID: "escaped strings",
 			Input: struct {
 				EscapedString  string
-				TemplateString string
+				TemplateString string `hcl:",expr"`
 			}{
 				"\n\t\r\\\"",
-				"\n\t\r\\\" ${\"\\\\ \\\"\"}",
+				"\"test-\u0041${\"\\\\ \\\"\"}\"",
 			},
 			Output: "escaped-strings",
 		},

tokens.go

@@ -50,7 +50,7 @@ func tokenize(in reflect.Value, meta fieldMeta) (tkns hclwrite.Tokens, err error
 	case reflect.String:
 		val := in.String()
 		if !meta.expression {
-			val = fmt.Sprintf(`"%s"`, EscapeString(val))
+			return hclwrite.TokensForValue(cty.StringVal(val)), nil
 		}
 		// Unfortunately hcl escapes template expressions (${...}) when using hclwrite.TokensForValue. So we escape
 		// everything but template expressions and then parse the expression into tokens.