in reply to Can this be a 1 line or simpler regex?
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;
I wouldn't call it simpler though.
Abigail
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