<p>I think you mean display names (OSM usernames are technically numbers). But Display names can have spaces in them, which could lead to confusion, so you really need a way to override this behavior.</p>

<p style="font-size:small;-webkit-text-size-adjust:none;color:#666;">—<br>Reply to this email directly or <a href="https://github.com/openstreetmap/openstreetmap-website/issues/1111#issuecomment-164420284">view it on GitHub</a>.<img alt="" height="1" src="https://github.com/notifications/beacon/ABWnLQIqB5OepN14ZoochxgcDW3fnQxaks5pPqc0gaJpZM4G0rSc.gif" width="1" /></p>
<div itemscope itemtype="http://schema.org/EmailMessage">
<div itemprop="action" itemscope itemtype="http://schema.org/ViewAction">
  <link itemprop="url" href="https://github.com/openstreetmap/openstreetmap-website/issues/1111#issuecomment-164420284"></link>
  <meta itemprop="name" content="View Issue"></meta>
</div>
<meta itemprop="description" content="View this Issue on GitHub"></meta>
</div>