Not as fast and doesn't handle a list of files, but for entertainment value: 
perl -MTie::File -e 'tie @file, 'Tie::File', $ARGV[0]; splice @file, 3
+1, 1;' filename

[download]
(Tie::File is in the standard lib now.)

In reply to Re: Save all but line 32! by perrin
in thread Save all but line 32! by bronto

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