Extra new line and trailing comma in `mat`

[TheJiahao]

• [x] I have tested with the master version of typstfmt and not just typst-lsp

Describe the bug Extra comma and new line inserted to long mat calls with named parameters before entries and semicolon. Almost same as #102, tested with typstfmt v0.2.9.

To Reproduce Minimal working examples:

$
mat(delim: "[", 0123456789012345678901234567890123456789012345678901234567;)
$

$
mat(delim: "[", 0123456789012345678901234567890123456789012345678901234567;0)
$

Steps to reproduce the behavior:

1. Run typstfmt once:

   $
     mat(
       delim: "[", 0123456789012345678901234567890123456789012345678901234567;,
   
     )
   $
   

2. Rerun typstfmt

   $
     mat(
       delim: "[", 0123456789012345678901234567890123456789012345678901234567;, ,
   
     )
   $
   

3. Repeat 2. and typstfmt adds extra comma every time.