Excerpt: […] missing in short posts

First of all please excuse for my bad English.

At this link the author asks for how to display “Read more” link in post shorter than the excerpt lenght:
https://www.ads-software.com/support/topic/excerpt-read-more-link-doesnt-show-on-short-posts?replies=5

I had the same problem and the solution presented worked perfectly for me.

But I would like to display the […] too! How I can? I cant find the code that manage the affixing of […]

I know that […] make poor sense in this case because there are no more words in the post but links in the excerpt do not work, so with […] I suggest readers to open the full post…

Any idea?

Thanks!

Adriano