Is this a Sergey Brin easter egg? His old resume contained 'hidden' cheeky comments (as HTML comments, check the source):

http://infolab.stanford.edu/~sergey/resume.html

HN submission about Brin's resume with numerous comments: https://news.ycombinator.com/item?id=9055516

<a href="http://www.hooli.xyz/" target="_blank" class="hidden-link">.</a>

a.hidden-link{color:inherit;cursor:text;text-decoration:none}

a.hidden-link:hover{color:inherit;cursor:text;text-decoration:none}

the twitter account is https://twitter.com/SiliconHBO

Wonder who Bighetti is supposed to be making fun of.

Why is one meta tag closed and the others open?

Simple: because both forms work, and HTML does what it thinks you want it to, and yada yada yada.

Less prescriptive languages (the "do what I mean, not what I say" variety) invite this sort of inconsistency of expression. If you like it, run with it (more power to you), but it's not for me. Sadly, XHTML and schema-validated markup seems to have lost the war. These days I just let my JavaScript code generate my markup for me and I don't worry about things like closing tags.

>These days I just let my JavaScript code generate my markup for me.

React?