Re: Suppressing occasional failures in copy2 regression test

Please find attached the updated script and test cases. Changes since last submission:

.) Script uses tabs for indentation.

.) Script almost passes perlcritic.com at 'stern' level.

.) Correct some RE matches, so that a ? mark only at the beginning of the line matches (^ anchor).

.) Employ hybrid approach to support RE in unordered set, and to get better performance:
    If there's no RE line in an unordered group of lines then perform sort on both arrays and then compare. If there _is_ an RE line in unordered group of lines, then do the O(n^2) processing to eliminate common lines and then report on missing lines.

TODO:

.) Using Tie::File to make code a little cleaner.

I agree that the choice of the hybrid approach for Unordered Set comparison makes script too indented, and maybe a little hard on eyes, but it's pretty simple and I have tried to delineate the major sections with proper comments.

Best regards,
--
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