[parsing] Fix a comment.

src/parsing/parser.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/parsing/parser.h"
 
 #include <memory>
 
 #include "src/api.h"
 #include "src/ast/ast-expression-rewriter.h"
@@ skipping 4217 matching lines @@
 // With the help of do-expressions and function.sent, we desugar yield* into a
 // loop containing a "raw" yield (a yield that doesn't wrap an iterator result
 // object around its argument).  Concretely, "yield* iterable" turns into
 // roughly the following code:
 //
 //   do {
 //     const kNext = 0;
 //     const kReturn = 1;
 //     const kThrow = 2;
 //
-//     let input = function.sent;
+//     let input = undefined;
 //     let mode = kNext;
 //     let output = undefined;
 //
 //     let iterator = GetIterator(iterable);
 //
 //     while (true) {
 //       // From the generator to the iterator:
 //       // Forward input according to resume mode and obtain output.
 //       switch (mode) {
 //         case kNext:
@@ skipping 871 matching lines @@
 
   return final_loop;
 }
 
 #undef CHECK_OK
 #undef CHECK_OK_VOID
 #undef CHECK_FAILED
 
 }  // namespace internal
 }  // namespace v8