2. Builtins

Parentheses around subroutines.

Parentheses cuddle subroutines.

No parentheses around builtins.

For example, good:

    split "\t", my_function($foo);

Bad:

    split ("\t", my_function ($foo) );

Certain things qualify as builtins:

• carp

• croak

• List::Util qw(first max)

• IO::Prompt qw(prompt)