H:\tmp\demo>perl -MWin32::autoglob -MData::Dumper -E "$Data::Dumper::Useqq=1; for $fn (@ARGV) { open $f,'<',$fn or die; @lines=<$f>; chomp @lines; say qq<$fn:>; say Dumper(\@lines); }" *.txt
linux-file.txt:
$VAR1 = [
          "A simple file generated",
          "on Linux with Unix",
          "line endings."
        ];

mac-file.txt:
$VAR1 = [
          "A simple file generated\ron Windows with Old Mac\rline endings.\r"
        ];

windows-file.txt:
$VAR1 = [
          "A simple file generated",
          "on Windows with Windows",
          "line endings."
        ];


H:\tmp\demo>