move end_of_input flag from octve_parser class to octave_lexer class * lex.h, lex.ll, parse.h, oct-parse.yy, toplev.cc (octave_lexer::end_of_input): Move data member from octave_parser. Change all uses. * lex.h, lex.ll (octave_lexer::handle_end_of_input): New function. (<<EOF>>): Use it. ({CCHAR}, .): USe it instead of simply returning END_OF_INPUT token. * lex.ll (octave_lexer::xunput): Don't unput EOF.

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