compiler: add a newline to function receiver type's debug dump

Change-Id: If54053b2396c5f6cfe11a3cec6d861c7840c07a2
Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/168408
Reviewed-by: Than McIntosh <thanm@google.com>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
diff --git a/go/ast-dump.cc b/go/ast-dump.cc
index 48e0065..94066ca 100644
--- a/go/ast-dump.cc
+++ b/go/ast-dump.cc
@@ -766,7 +766,7 @@
   if (rec != NULL)
     {
       this->emitpre(notag, NULL);
-      this->typeref("receiver ", rec->type(), NULL);
+      this->typeref("receiver ", rec->type(), "\n");
     }
   const Typed_identifier_list* parameters = ft->parameters();
   if (parameters != NULL)