Your regex matches one or more whitespace, so it should match the whitespace between words. Changing it to /^\s+$/ anchors it at the start and end of the line, which works. Or you can use:

next unless $line =~ /\S/;

"next unless the line contains a non-whitespace character"

qq

In reply to Re: regexp for blank lines by qq
in thread regexp for blank lines by cspears

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