I just realized I have two
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0 user-scalable=no">
Have a look at the definition of the
meta element. It says:
Exactly one of the
charset, attributes must be specified.
So your two example
meta elements couldn’t possibly be merged, because then the
meta element would have the
charset and the
name attribute, which is not allowed.