Experimental lexer generator: comment fixes.

src/lexer/lexer_py.re

 # Copyright 2013 the V8 project authors. All rights reserved.
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are
 # met:
 #
 #     * Redistributions of source code must retain the above copyright
 #       notice, this list of conditions and the following disclaimer.
 #     * Redistributions in binary form must reproduce the above
 #       copyright notice, this list of conditions and the following
 #       disclaimer in the documentation and/or other materials provided
@@ skipping 47 matching lines @@
 "=="          <|push_token(EQ)|>
 "="           <|push_token(ASSIGN)|>
 "!=="         <|push_token(NE_STRICT)|>
 "!="          <|push_token(NE)|>
 "!"           <|push_token(NOT)|>
 
 "//"          <||SingleLineComment>
 "/*"          <||MultiLineComment>
 "<!--"        <||HtmlComment>
 
-whitespace? "-->" <{
+"-->" <{
   if (!just_seen_line_terminator_) {
     PUSH_TOKEN(Token::DEC);
     start_ = cursor_ - 1;
     goto code_start;
   }
 }||SingleLineComment>
 
 ">>>="        <|push_token(ASSIGN_SHR)|>
 ">>>"         <|push_token(SHR)|>
 "<<="         <|push_token(ASSIGN_SHL)|>
@@ skipping 120 matching lines @@
 <<Identifier>>
 identifier_char <|push_token(IDENTIFIER)|continue>
 /\\u[0-9a-fA-F]{4}/ <{
   if (V8_UNLIKELY(!ValidIdentifierPart())) {
     goto default_action;
   }
 }|push_token(IDENTIFIER)|continue>
 
 <<SingleLineComment>>
 line_terminator  <|push_line_terminator|>
+eof <|skip_and_terminate|>
 catch_all <||continue>
 
 <<MultiLineComment>>
 "*/"             <|skip|>
 # TODO find a way to generate the below rule
 /\*[^\/]/        <||continue>
 line_terminator  <push_line_terminator||continue>
 catch_all        <||continue>
 
 <<HtmlComment>>
 "-->"            <|skip|>
 # TODO find a way to generate the below rules
 /--./            <||continue>
 /-./             <||continue>
 line_terminator  <push_line_terminator||continue>
 catch_all <||continue>