Lexer not generated correctly by AntlrDT

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The lexer automatically built by AntlrDT is different from the one generated by a manual call to the antlr library, through

java -jar lib/antlr-4.9.2-complete.jar

The automatically built one fails to work. Concretely, the following functions generate different return values:

private static String[] makeRuleNames()
private static String[] makeLiteralNames()

The following Eclipse project demonstrates the problem: compare bug.AntlrDTGeneratedToyParser and bug.ManuallyGeneratedToyParser.

antlrDTBug.zip

Thanks for looking into this, and keep up the good work!
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