How to modify the BuddyPress message thread excerpt ellipses?

Hello and thanks in advance for any assistance!

I'm trying to look through the core files of BuddyPress to find where bp_message_thread_excerpt() pulls in the ellipses for excerpts that are longer than the character limit. By default, it looks like [...] and I would like to modify it so that it is just the classic set of three dots without the square brackets. Unfortunately, I can't find where I can change this.

Any help would be great!