No need.

In his file, you can see UTF-8 values: ° -> C2 B0 ’ -> E2 80 99

UTF-8 is backward compatible with ASCII.

So if you display files and pages by default in UTF-8 you are fine for both ASCII and UTF-8.

I used iOS Safari’s reader view to fix the word wrapping. The degree symbols did not display correctly though.

Donald Knuth not an expert on the boll weevil. Your point is?

He might actually be. But that’s fine, he’s more concerned with printed works than digital ones.