I think I found a mistake in a quiz.
The question was why this link wouldn't work:
<a href=https://www.codecademy.com/>click here</a>
But none of the answers showed that it should be:
Instead they say it's wrong because the weblink has no quotation marks.
But it works just fine like this:
<a href=https://www.codecademy.com>click here</a>