Nice! I'd add a blurb about using close(), as well as a scoped block example (perhaps linking the two). One good example of when to use a block is using a local record separator variable (the close isn't really necessary in this case, but I digress):
my $file = 'test.txt';
my $json;
{
local $/;
open my $fh, '<', $file or die $!;
$json = <$fh>;
close $fh;
}
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