Returns the true Damerau Levenshtein edit distance of strings with adjacent
transpositions. Useful for fuzzy matching, DNA variation metrics, and fraud
detection.

Defaults to using Pure Perl the Text::Levenshtein::Damerau::PP manpage, but
has an XS addon the Text::Levenshtein::Damerau::XS manpage for massive
speed imrovements. Works correctly with utf8 if backend supports it; known
to work with 'Text::Levenshtein::Damerau::PP' and
'Text::Levenshtein::Damerau::XS'.

use utf8;
my $tld = Text::Levenshtein::Damerau->new('ⓕⓞⓤⓡ');
print $tld->dld('ⓕⓤⓞⓡ');