Documentation says...

If FH is not specified then the return value, on success, will be a reference to an array containing the article requested, each entry in the array will contain one line of the article.

I've used this module before and it seems like it returned a real array from the body() method, so I'm guessing you can do:

print "$_\n" for $article->body();

But if it's returning an arrayref, just dereference it:

print "$_\n" for @{$article->body()};