|There's more than one way to do things|
Re^3: Encoding Decoding on multiple formats RFCby kcott (Chancellor)
|on Sep 21, 2017 at 09:28 UTC||Need Help??|
"... using the <pre></pre> tags to encode the UTF-8 data."
That's quite correct to do that!
You also need to replace special characters with entities:
[The "HTML" ones are generic (i.e. not just for this site); The "PerlMonks" ones are specific to this site to prevent automatic link generation.]
These appear under the textarea when you're composing your message:
"You may need to use entities for some characters, as follows. ..."
Unfortunately, that list is no longer there when previewing, nor when editing after node creation.