[COMPLIANCE] Add Copyright and License Headers (#586)

* [COMPLIANCE] Add Copyright and License Headers

* add copywrite file and revert headers in testdata

---------

Co-authored-by: hashicorp-copywrite[bot] <110428419+hashicorp-copywrite[bot]@users.noreply.github.com>
Co-authored-by: Liam Cervante <liam.cervante@hashicorp.com>

1 files changed, 3 insertions, 0 deletions

diff --git a/pos.go b/pos.go
index 06db8bf..1bbbce8 100644
--- a/pos.go
+++ b/pos.go
@@ -1,3 +1,6 @@
+// Copyright (c) HashiCorp, Inc.
+// SPDX-License-Identifier: MPL-2.0
+
 package hcl
 
 import "fmt"