Fix scanner tests on Windows

This is necessary because of the effects of autocrlf on Windows.

decoder_test.go

@@ -7,6 +7,7 @@ import (
 	"testing"
 
 	"github.com/hashicorp/hcl/hcl/ast"
+	"github.com/hashicorp/hcl/testhelper"
 )
 
 func TestDecode_interface(t *testing.T) {
@@ -88,12 +89,12 @@ func TestDecode_interface(t *testing.T) {
 		{
 			"multiline.hcl",
 			false,
-			map[string]interface{}{"foo": "bar\nbaz\n"},
+			map[string]interface{}{"foo": testhelper.Unix2dos("bar\nbaz\n")},
 		},
 		{
 			"multiline_no_eof.hcl",
 			false,
-			map[string]interface{}{"foo": "bar\nbaz\n", "key": "value"},
+			map[string]interface{}{"foo": testhelper.Unix2dos("bar\nbaz\n"), "key": "value"},
 		},
 		{
 			"multiline.json",

testhelper/unix2dos.go

@@ -0,0 +1,15 @@
+package testhelper
+
+import (
+	"runtime"
+	"strings"
+)
+
+// Converts the line endings when on Windows
+func Unix2dos(unix string) string {
+	if runtime.GOOS != "windows" {
+		return unix
+	}
+
+	return strings.Replace(unix, "\n", "\r\n", -1)
+}