Add Text on Placement Position of Degree Sign

[shervinafshar]

Originally posted by @TitusNemeth in https://github.com/w3c/alreq/issues/101#issuecomment-1028010861

At the risk of reviving an old discussion, here's a question: in the current draft is a statement about the degree sign to be placed on the right of the number without any qualification. I wondered if this is correct, as I have seen the opposite custom, placing the degree sign to the left (in logical reading order). Incidentally Najib's table above seems to suggest that both can happen.

[shervinafshar]

As mentioned in Issue#101, CLDR shows the distinction between Arabic and Persian:

• ar: https://st.unicode.org/cldr-apps/v#/ar/Weather/33c368f9174f3ad

• fa: https://st.unicode.org/cldr-apps/v#/fa/Weather/2bb26ab5dcc064f6