Some Function::Parameters syntax not supported

[iynehz]

Like the named parameters as described at https://metacpan.org/pod/Function::Parameters#Named-parameters

[iynehz]

Now I confirm it's also somewhat related the the same issue as #13. and #14 can fix the error, although it's still not well tidied. For example,

use 5.014;
use Function::Parameters;

fun foo (: $x     = 1, :    $y =    2) {
    say "$x, $y";
}

Without #14 you get an error with perltidier. With #14 the error is gone, but the signatures are not tidied at all. It would be ideal to tidy it to like below,

fun foo (:$x = 1, :$y = 2) {
    say "$x, $y";
}

[mvgrimes]

#14 has been merged.

Signatures are not tidied for any of the keywords (as mentioned in docs). I'm open to adding that, but it would take quite a bit of work. Patches are welcome!