LaTeX not being rendered correctly for math line of documentation in Box example

This line
https://github.com/EnzymeAD/Enzyme.jl/blob/b5886809ac64e9dc5baba03a9039f175ad78c9cc/examples/box.jl#L360
is not rendered in Chrome or Firefox, and inspecting the code in Overleaf I see that there is use of `\right|` without a corresponding left call. I assume that this is intended as math notation for "restricted to". Looking at some search results, this requires a `\left.\ to match.
https://tex.stackexchange.com/questions/22252/how-to-typeset-function-restrictions
Could someone please confirm that the rendering is broken? Or does this work for some LaTex interpreter?
Thanks!