s/[\r\n]+$­//;

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I much prefer s/\s*$//; because one should never write new code that causes trailing whitespace to be significant.

be strict in what you output  binmode  $fh, '...:crlf'­;

That seems like something that is quite unlikely to be what one should do. That might make sense when trying to use a Unix system to write a text file that will be used by some MS Windows program(s).

For the most common case, you should replace that 'binmode' code with this code:

- tye        

In reply to Re^2: Native newline encoding (more liberal) by tye
in thread Native newline encoding by salva

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