[perl #126241] operator names need to be valid, parsable Perl

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# New Ticket Created by  Larry Wall 
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10:06 < TimToady>  m: sub infix:«~~>» { "$^a -> $^b\n" }; say &[~~>].name
10:06 <+camelia> rakudo-moar 92be57: OUTPUT«infix:<~~>>␤»


This needs to be infix:<~~\>> or or infix:«~~>» or some other
round-trippable name, both for clarity and for recomposability under
evalish or macroish scenarios.