[perl #77638] [BUG] prefix:<-> numifies a Str in Rakudo, prefixes a '-' in Perl 5

[Carl Mäsak]

# New Ticket Created by  "Carl Mäsak" 
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<masak> rakudo: my $x = 'aaa'; print ++$x, ' : '; print -$x, ' : '; say ++$x;
<p6eval> rakudo d75c61: OUTPUT«aab : -0 : aac␤»
* masak submits rakudobug
<masak> this one is not spec'd, and Perl 5 prints '-aab' for the middle term.
<masak> buubot: eval my $x = 'aaa'; print ++$x, ' : '; print -$x, ' :
'; print ++$x, "\n";
<buubot> masak: aab : -aab : aac 1