comment on

Maybe I misunderstood the problem, but I'd try:

~~$txt =~ s/(.{1,3})/sprintf"%03s\n",$1/ge;~~

Update: missed the "empty string" part:

 ...
 $txt =~ s/(.{1,3}|^$)/sprintf"'%3s'\n",$1/ge;
 print $txt;
 ...
[download]

Regards

mwa

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