Update the tensor function

[StrangeGirlMurph]

Hey :) I modified the tensor function a bit. It now defaults to showing everything as a superscript if no + or - is given. I also made the function a bit more robust. It for example also handles cases like $tensor(R,e,-)$.

I also encountered and dove deep into the same thing that confused you.

typst-physics/physica.typ

Line 841 in 1cd65e1

} else { // Curiously, equality with [-] is always false, so we don't do it

If you want to learn more see the discussion on discord: https://discord.com/channels/1054443721975922748/1088371867913572452/1297487726387400775 (Basically "-" != math.minus = sym.minus)

Feel free to just take this as an inspiration if you're not happy with the implementation directly. Also please play around with it. It should feel very natural.

[Leedehai]

Thank you!