[parser] fix token end position for regexp literals

src/scanner.cc

 // Copyright 2011 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.
 
 // Features shared by parsing and pre-parsing scanners.
 
 #include "src/scanner.h"
 
 #include <stdint.h>
 
@@ skipping 1377 matching lines @@
   LiteralScope literal(this);
   while (c0_ >= 0 && unicode_cache_->IsIdentifierPart(c0_)) {
     if (c0_ != '\\') {
       AddLiteralCharAdvance();
     } else {
       return false;
     }
   }
   literal.Complete();
 
-  next_.location.end_pos = source_pos() - 1;
+  next_.location.end_pos = source_pos();
   return true;
 }
 
 
 const AstRawString* Scanner::CurrentSymbol(AstValueFactory* ast_value_factory) {
   if (is_literal_one_byte()) {
     return ast_value_factory->GetOneByteString(literal_one_byte_string());
   }
   return ast_value_factory->GetTwoByteString(literal_two_byte_string());
 }
@@ skipping 224 matching lines @@
     backing_store_.Add(static_cast<uint8_t>((one_byte_length >> 7) | 0x80u));
   }
   backing_store_.Add(static_cast<uint8_t>(one_byte_length & 0x7f));
 
   backing_store_.AddBlock(bytes);
   return backing_store_.EndSequence().start();
 }
 
 }  // namespace internal
 }  // namespace v8