Experimental lexer generator: Don't go BACK();

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 177 matching lines @@
   }
 } <<continue>>
 default_action push_token(IDENTIFIER)
 
 <SingleLineComment>
 line_terminator  { PUSH_LINE_TERMINATOR(); }
 eof              <<terminate>>
 catch_all <<continue>>
 
 <MultiLineComment>
-"*/"             { SKIP(); BACK(); goto code_start;}
+"*/"             { SKIP(); goto code_start;}
 /\*[^\057]/      <<continue>>
 # need to force action
 line_terminator+ { PUSH_LINE_TERMINATOR(); } <<continue>>
 eof              <<terminate>>
 catch_all <<continue>>
 
 <HtmlComment>
 "-->"            { SKIP(); }
 /--./            <<continue>>
 /-./             <<continue>>
 # need to force action
 line_terminator+ { PUSH_LINE_TERMINATOR(); } <<continue>>
 eof              <<terminate>>
 catch_all <<continue>>