Take the following example code:

package exported

var IPs = []string{
"127.0.0.1", // localhost

// IPv6 localhost
"::1",
}

…and render it using godoc:

% go get -u golang.org/x/tools/cmd/godoc
% go get -u github.com/stapelberg/godoc-exported
% godoc -http=localhost:6060
% google-chrome http://localhost:6060/pkg/github.com/stapelberg/godoc-exported/

You’ll see:

I.e., the comments are not printed.

I’m guessing this is a consequence of go/ast’s comment handling being tricky. I tried taking a stab at it, but couldn’t get very far, so I figured I’d file a bug and see if someone more familiar with the code can advise what needs to be done here.