Olivero's blockquote pseudo-element decoration *sometimes* does not display properly

I've seen this issue several times, however I cannot reliably reproduce it.

The issue is that sometimes the browser displays a “ in place of the Left Double Quotation Mark “.

I've seen this several (maybe 10ish) times over the past couple years, and I cannot reliably reproduce it. I generally use Chrome on MacOS, so I'm not sure if this is a Chrome thing, Mac thing, or something else entirely.

When this happens, reloading the page in the browser will fix it.

Fixing it

We cannot accurately reproduce this, but we can add the decoration in another way that will hopefully sidestep this bug:

We currently do a content: "“"; at https://git.drupalcode.org/project/drupal/-/blob/10.0.x/core/themes/oliv...

I propose we add the quote using its unicode characters (see https://unicode-table.com/en/201C/). This would look like content: "\201c";

Testing

Since we cannot reliably reproduce the issue, testing would involve ensuring no regressions across supported browsers.