If there were repeated, contiguous newlines, that would only avoid replacing the final newline. 

c:\@Work\Perl\monks>perl -wMstrict -le
"my $line = qq{HeHi\n\n\nHo};
 print qq{[$line]};
 ;;
 $line =~ s/Hi\s*(?=\n)//;
 print qq{[$line]};
"
[HeHi


Ho]
[He
Ho]

[download]

Give a man a fish:  <%-(-(-(-<

In reply to Re^2: \s matches newline in regex? by AnomalousMonk
in thread \s matches newline in regex? by Only1KW

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