fix XQUANTITIES in docstring

[yucongalicechen]

          @bobleesj in the docstring the XQUANTITIES is not showing. Shall I open a new issue or just comment on #239?

Originally posted by @yucongalicechen in #246 (comment)

[bobleesj]

@yucongalicechen do you mind addressing this one? I am away from keyboard till Thursday evening

[yucongalicechen]

@yucongalicechen do you mind addressing this one? I am away from keyboard till Thursday evening

No prob, I already self-assigned this haha

[sbillinge]

I left a comment on #246 . This may not fix, and that may be ok. I would rather keep this as a dynamic unpack and have it not build right in the API docs than move it to an explicitly typed list that is harder to maintain.

[bobleesj]

If it works sth like,

Must be one of "x, y, z" defined in XQUANTITY.

Where x y z ... are dynamically rendered.

Hitting 2 birds (user, dev facing) at once?

[sbillinge]

I would just leave it tbh. In danger of just making it worse here

[yucongalicechen]

I was thinking about something similar to @bobleesj 's comment. @sbillinge shall i close this issue or move it to 3.7.0 release then?