Not sure if this is a bug or what. Running this on a mac but guessing results would be the same on *nix: 

#! /usr/bin/env perl

use strict;
use warnings;
use File::Spec::Win32;
use File::Spec;

my $nuts = File::Spec->catfile('blah', '');
print $nuts . "\n";

# prints "blah/" (note the slash)

my $two_nuts = File::Spec::Win32->catfile('blah', '');
print $two_nuts . "\n";

# prints "blah" (no slash)

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$PM = "Perl Monk's";
$MCF = "Most Clueless Friar Abbot Bishop Pontiff Deacon Curate Priest Vicar";
$nysus = $PM . ' ' . $MCF;
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In reply to File::Spec::Win32 returning different result than File::Spec when doing catfile with empty string by nysus

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