Table of contents overflow bug

[aneziac]

Minimal failing example (due to @EsotericSquishyy)

#import "@local/superTemplate:0.2.0": *
#import math_mod: *
#show: notes.with("Test", "test")


= Small
= Small
= Small
= Small
= Small
= Small
= Small
= Small
= Small
= Small
= Small
= Small
= Small
= Small
= Small
= Small
= Small
= Small
= Small
= Small
= Small
= Small
= Small
= Small
= Small
= Small
= Small
= Small
= Small
= Small
= Small
= Small

= Small

Highly related to #11: a bug was introduced at some point that makes this not just not render correctly, but fail to compile.