> The attached patch rephrases three pieces of Perl documentation which > suggest that calling UNIVERSAL::isa() or UNIVERSAL::can() directly is a > good idea. The revised version explains why it's a bad idea and gives > more correct recommendations.
You seem to have removed all mentions of use of UNIVERSAL::isa($x, 'HASH') without either introducing any equivalent replacement or indicating any valid reason why it would be a bad idea. This use of UNIVERSAL::isa is essentially orthogonal to the other uses; I think it makes sense to leave it in and document it separately.