I noticed that too, but I don’t see it documented. The closest I’ve come are two references to eliminating arrows between “brackets subscripts” — perlref#Using-References (3) and perlreftut#Arrow-Rule. Or does a pair of parentheses () also count as a “subscript”?

Athanasius <°(((>< contra mundum Iustus alius egestas vitae, eros Piratica,

In reply to Re^3: call external sub ref from method in single line by Athanasius
in thread call external sub ref from method in single line by previous

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