The following will remove all trailing empty lines. 
perl -i.bak -nle"while ($empty) { --$empty; print '' } if (length()) {
+ print } else { ++$empty }" filename

[download]

For example, 

foo CR LF
bar CR LF
CR LF
CR LF

[download]
will become 
foo CR LF
bar CR LF

[download]

In reply to Re: delete last CR and LF from txt by ikegami
in thread delete last CR and LF from txt by mph151

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