Typst: $\partial_{[i} f_{j]}$ is rendered incorrectly

[certik]

Here is the source code:

* 0-form: $\partial_i f$
* 1-form: $\partial_{[i} f_{j]}$
* 2-form: $\partial_{[i} A_{jk]}$
* 3-form: $\partial_{[i} A_{jkl]} = 0$ (in 3 dimensions, since rank 4 fully
  antisymmetric tensor in 3D is identically 0)

Here is how it looks like in the typst output:

and here is how it looks like in latex:

Latex is correct, typst is incorrect.

[rowanc1]

Looks like if the brackets are not balanced, they need to be spelled out (i.e. bracket.r). Will get a PR together.