I think the anonymous monk was wanting you to think in more detail about what the following does:

s/$Npod/$N$1$n/s for @file;

[download]

You might write that in longhand as:

foreach my $line (@file) {
   $line =~ s/$Npod/$N$1$n/s;
}

[download]

In other words, it's acting on one line at a time. The only pod footnote in your example input was split over multiple lines.

package Cow { use Moo; has name => (is => 'lazy', default => sub { 'Mooington' }) } say Cow->new->name

In reply to Re^5: matching POD footnote by tobyink
in thread matching POD footnote by anek77713

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