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  1. or download this
    s/\\n/\n/g;
  2. or download this
    s/\\/\\s/g;
s/\n/\\n/g;
s/\r/\\r/g;
  3. or download this
    s/\\n/\n/g;
s/\\r/\r/g;
s/\\s/\\/g;
  4. or download this
    my %xlat = ('\\' => "\\", 'n' => "\n", 'r' => "\r");

s/\G(?:\\(.)|(.))/defined($1) ? $xlat{$1} : $2/eg;