[generators] Desugar yield*.

src/ast/prettyprinter.cc

Index: src/ast/prettyprinter.cc
diff --git a/src/ast/prettyprinter.cc b/src/ast/prettyprinter.cc
index 1f6b8c31debb8376d3aff273ab6c7d8e40b0fed7..c8c4c63f7b5570ad1e792ac7a3828431480a66a1 100644
--- a/src/ast/prettyprinter.cc
+++ b/src/ast/prettyprinter.cc
@@ -1580,7 +1580,9 @@ void AstPrinter::VisitAssignment(Assignment* node) {
 
 
 void AstPrinter::VisitYield(Yield* node) {
-  IndentedScope indent(this, "YIELD", node->position());
+  EmbeddedVector<char, 128> buf;
+  SNPrintF(buf, "YIELD (kind %d)", node->yield_kind());
+  IndentedScope indent(this, buf.start(), node->position());
   Visit(node->expression());
 }