That's because Abigail-II's regex only handles the case of deletions. To support insertions and modifications, you need a more robust approach.
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Jeff[japhy]Pinyan:
Perl,
regex,
and perlhacker, who'd like a job (NYC-area)
s++=END;++y(;-P)}y js++=;shajsj<++y(p-q)}?print:??;