You're doing the right thing by handling both plural and singular here.  You can also use something like https://metacpan.org/pod/Lingua::EN::Inflect to handle this logic for you.  However, we can just keep it really simple:

```
<% IF plusser_others %>
<p><b><% plusser_others %> user(s) ++ed this. </b></p>
<% END %>
```

That handles both cases, everybody should understand what that means and it doesn't require a second condition in the template. :)