use warnings FATAL => 'all';
use strict;
#use diagnostics;
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• By default, I want warnings to be promoted to errors.
• diagnostics is commented out so that it's easy to remember to enable it when needed (but then I have to remember to comment it back out).

I have Data::Dumper as an editor macro/bindkey so I can slap it down whenever and wherever I need it. Other dumpers may have superior features, but this is the only Core module and, therefore, it's most portable.

use Data::Dumper; $Data::Dumper::Sortkeys=1; print Dumper(\%@foo);
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