Field permission in views shows a trailing comma

Problem/Motivation

Steps to reproduce:

1. Edit new users view
2. Add field, filter by user, select permissions
3. Click save
4. Place the block in your frontpage

The admin user shows:

<div class="views-field views-field-permission"><span class="field-content">, View published content, Use the <a href="/admin/config/content/formats/manage/basic_html">Basic HTML</a> text format, View comments, Post comments, Skip comment approval, [...]</span></div>

Proposed resolution

Remove the first comma and space.

Remaining tasks

User interface changes

API changes