I do. It makes the one element list an exception (with an exception to the exception if said list has a trailing comma).
@a[1,2,3,4]; # Ok.
@a[1,2,3]; # Ok.
@a[1,2]; # Ok.
@a[1]; # Warning.
@a[1,]; # Good boy, you know the secret handshake.
You don't have a problem with that? I think it's a pointless irregularity.
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