Fully document is-approx from Test.pm6
Fully document is-approx from Test.pm6

This updates tbrowder++ effort to document this sub, to reflect the new behaviour
of is-approx merged in Rakudo commit bb165a577d63e8c669c0bd19fee575e6be12776f

tbrowder/doc,MasterDuke17/doc,jonathanstowe/doc,antquinonez/doc,stmuk/doc,jonathanstowe/doc,MasterDuke17/doc,dmaestro/doc,antquinonez/doc,tbrowder/doc,stmuk/doc,tbrowder/doc,MasterDuke17/doc,jonathanstowe/doc,jonathanstowe/doc,stmuk/doc,MasterDuke17/doc,perl6/doc,perl6/doc,stmuk/doc,gfldex/doc,dmaestro/doc,perl6/doc,dmaestro/doc,dmaestro/doc,gfldex/doc,perl6/doc,gfldex/doc,stmuk/doc,antquinonez/doc,gfldex/doc,gfldex/doc,tbrowder/doc,antquinonez/doc,dmaestro/doc,jonathanstowe/doc,perl6/doc,antquinonez/doc