hcl/printer: clear trailing newline from heredoc

hcl/printer/nodes.go

@@ -319,6 +319,7 @@ func (p *printer) objectType(o *ast.ObjectType) []byte {
 			// If the value is a heredoc, we "poison" it so that we can
 			// clean it up later. Heredocs don't indent their fields.
 			if lit, ok := item.Val.(*ast.LiteralType); ok && lit.Token.Type == token.HEREDOC {
+				val = val[:len(val)-1]
 				val = p.heredocIndent(val)
 			}
 

hcl/printer/testdata/complexhcl.golden

@@ -37,7 +37,6 @@ resource aws_instance "web" {
 		description = <<EOF
 ANOTHER NETWORK INTERFACE
 EOF
-
 	}
 }
 
@@ -52,5 +51,4 @@ output "web_ip" {
 	value = <<EOF
 TUBES
 EOF
-
 }

hcl/scanner/scanner_test.go

@@ -331,7 +331,9 @@ func TestRealExample(t *testing.T) {
 
 	    network_interface {
 	        device_index = 0
-	        description = "Main network interface"
+	        description = <<EOF
+Main interface
+EOF
 	    }
 	}`
 
@@ -389,7 +391,7 @@ func TestRealExample(t *testing.T) {
 		{token.NUMBER, `0`},
 		{token.IDENT, `description`},
 		{token.ASSIGN, `=`},
-		{token.STRING, `"Main network interface"`},
+		{token.HEREDOC, "<<EOF\nMain interface\nEOF\n"},
 		{token.RBRACE, `}`},
 		{token.RBRACE, `}`},
 		{token.EOF, ``},