User settings read "s_('Preferences|Navigation theme')" instead of just "Navigation theme" on gitlab.com

Summary

In user settings, on https://www.gitlab.com, the "Navigation theme" outputs s_('Preferences|Navigation theme')" instead of just "Navigation theme".

Steps to reproduce

1. Visit https://gitlab.com/profile/preferences
2. Take a look at the first entry

Example Project

not relevant

What is the current bug behavior?

User settings read "s_('Preferences|Navigation theme')"

What is the expected correct behavior?

It should read "Navigation theme"

Relevant logs and/or screenshots

Output of checks

This bug happens on GitLab.com

Results of GitLab environment info

Not possible

Results of GitLab application Check

Not possible

Possible fixes

I sadly don't know, but it should be here: https://gitlab.com/gitlab-org/gitlab-ce/blob/master/app/views/profiles/preferences/show.html.haml