Content math bad case

[Enter-tainer]

https://github.com/Enter-tainer/geshihua/blob/0d96c96756cfad197a89c33eb4131515f795cbd3/tests/assets/unit/markup/content-math.typ

This is because we don't want to touch content block. There for the dollar sign and bracket are glued together

[Enter-tainer]

consider adding a line_ after content block

[Enter-tainer]

#23