I think the above is fine, but if you insist on less lines: 
    %& = ("\t" => '\t', "\n" => '\n', "\r" => '\r', "\f" => '\f');
    s/[\t\n\r\f]/$&{$&}/g;

[download]

I wouldn't call it simpler though.

Abigail

In reply to Re: Can this be a 1 line or simpler regex? by Abigail-II
in thread Can this be a 1 line or simpler regex? by smackdab

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