enable folding for multi-line constructs with ()

[mättu]

I often do things like

my %hash = (

parameter => 'what-ever-you-like-it-to-default-to',

%hash-to-overwrite-defaults

);

or

$my-object -> DoSomething? (

parameter1 => 'foo',
parameter2 => 'bar',
etc => 'whatever'

);

It would be nice to be able to fold them like {} blocks.