LIMITATIONS
    Parsing Limitations
        Perltidy should work properly on most perl scripts. It does a lot of
        self-checking, but still, it is possible that an error could be
        introduced and go undetected. Therefore, it is essential to make
        careful backups and to test reformatted scripts.

        The main current limitation is that perltidy does not scan modules
        included with 'use' statements. This makes it necessary to guess the
        context of any bare words introduced by such modules. Perltidy has
        good guessing algorithms, but they are not infallible. When it must
        guess, it leaves a message in the log file.

        If you encounter a bug, please report it.

    What perltidy does not parse and format
        Perltidy indents but does not reformat comments and "qw" quotes.
        Perltidy does not in any way modify the contents of here documents
        or quoted text, even if they contain source code. (You could,
        however, reformat them separately). Perltidy does not format
        'format' sections in any way. And, of course, it does not modify pod
        documents.