Update demo

README.md

@@ -30,9 +30,9 @@ everybody", this package was renamed from `physics` to `physica`.
 
 See the [manual](https://github.com/Leedehai/typst-physics/blob/master/physica-manual.pdf) for more details.
 
-![demo1](https://github.com/Leedehai/typst-physics/assets/18319900/b0e2753e-ba72-46d4-809f-d6a12d8d1d6d)
+![demo-quick](https://github.com/Leedehai/typst-physics/assets/18319900/4a9f40df-f753-4324-8114-c682d270e9c7)
 
-![demo2](https://user-images.githubusercontent.com/18319900/236073825-e91b4601-7e92-490b-a7e4-e9e405a2147b.png)
+![demo-larger](https://user-images.githubusercontent.com/18319900/236073825-e91b4601-7e92-490b-a7e4-e9e405a2147b.png)
 
 ## Using physica in your Typst document
 

physica-manual.typ

@@ -24,7 +24,7 @@
 
 #align(center)[
   Version #version, October 25, 2023 \
-  Doc updated: November 21, 2023
+  Doc updated: November 26, 2023
 ]
 
 #set par(justify: true)
@@ -56,10 +56,10 @@ With `typst`'s #linkurl("package management", "https://github.com/typst/packages
 ```typst
 #import "@preview/physica:0.8.1": *
 
-$ curl (grad f), pdv(,x,y,[1,2]), tensor(Gamma,+k,-i,-j) = pdv(vb(e_i),x^j)vb(e^k) $
+$ curl (grad f), pdv(,x,y,z,[2,k]), tensor(Gamma,+k,-i,-j) = pdv(vb(e_i),x^j)vb(e^k) $
 ```
 
-$ curl (grad f), pdv(,x,y,[1,2]), tensor(Gamma,+k,-i,-j) = pdv(vb(e_i),x^j)vb(e^k) $
+$ curl (grad f), pdv(,x,y,z,[2,k]), tensor(Gamma,+k,-i,-j)=pdv(vb(e_i),x^j)vb(e^k) $
 
 = The symbols