While I like to reach the widest possible audience with a CPAN module, I cannot bring myself to write any Perl code without at least these basic features:

• lexical filehandles and three-argument open - both introduced in Perl 5.6, as noted at "open" Best Practices by haukex
• use strict and use warnings - use warnings introduced in Perl 5.6, as noted at use strict and use warnings (perlmaven)

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