"Add Members" drop-down doesn't separate Name/Username

Summary

The popup in the "Add Members" dialog concatenates the name and the username.

Steps to reproduce

In a Project, Settings, Members start typing a name in the "Select members to invite" box.

I'm using Firefox 53.0.3 and with no Ad Blocker running. Haven't tried it on other browsers yet.

What is the current bug behavior?

The dropdown shows the avatar, real name, and username with no space between real name and username: EG "Nicholas ClarkN_Clark"

See screenshot.

What is the expected correct behavior?

On our local gitlab (GitLab 9.2.5) instance I see the Real name with the username underneath.

Relevant logs and/or screenshots

This is how it looks on gitlab.com:

And this is how it looks on our local omnibus install:

Output of checks

This bug happens on GitLab.