[io grant] Fix incorrect information for IO::Path.absolute
[io grant] Fix incorrect information for IO::Path.absolute

The method does not use `$*CWD`, but the object's CWD attribute,
if no base is given.
stmuk/doc,jonathanstowe/doc,dmaestro/doc,antquinonez/doc,stmuk/doc,MasterDuke17/doc,perl6/doc,tbrowder/doc,gfldex/doc,stmuk/doc,dmaestro/doc,perl6/doc,gfldex/doc,stmuk/doc,perl6/doc,dmaestro/doc,jonathanstowe/doc,MasterDuke17/doc,perl6/doc,tbrowder/doc,jonathanstowe/doc,MasterDuke17/doc,perl6/doc,antquinonez/doc,MasterDuke17/doc,jonathanstowe/doc,antquinonez/doc,dmaestro/doc,stmuk/doc,tbrowder/doc,antquinonez/doc,gfldex/doc,jonathanstowe/doc,tbrowder/doc,dmaestro/doc,gfldex/doc,gfldex/doc,antquinonez/doc