If you "forked" them then this implies that both versions are under version-control, e.g. git or svn. Both of which can compare and reconcile differences – especially if you did each set of changes (as you should have) on separate branches. You should have no need of Perl-tomfoolery here.

In reply to Re: RFC: perl sub diff between two files by Anonymous Monk
in thread RFC: perl sub diff between two files by bliako

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