is($str, "hi\n", '->new modified body like Email::Simple');
is($eml->body, "hi\n", '->body works');
is($eml->as_string, "a: b\n\nhi\n", '->as_string');
is($str, "hi\n", '->new modified body like Email::Simple');
is($eml->body, "hi\n", '->body works');
is($eml->as_string, "a: b\n\nhi\n", '->as_string');