safe filter still encodes quotes

[Barry Mieny]

I use nunjucks (3.2.3) in eleventy to generate an iCalendar file, but it refuses to not encode quotes to ' and " respectively even when I use the safe filter.

Is there something I'm missing, or something I can set, or another filter I can use to force it to really render just the raw string?

I have tried this in eleventy and with just nunjucks and the result was the same.