Context

No response

Bug description

Bug

KaTeX does not render array environment correctly.

The following is rendered correctly.

$$
\begin{array}{rcl}
E(X) & = & \displaystyle\sum_{k=0}^n k \cdot ({}_n C_k) p^k q^{n-k}\\\\
     & = & \displaystyle\sum
\end{array}
$$

The following results in the entire math section being rendered as raw code in a paragraph.

$$
\begin{array}{rcl}
E(X) & = & \displaystyle\sum_{k=0}^n k \cdot ({}_n C_k) p^k q^{n-k}\\\\
     & = & \displaystyle\sum_{k=0}
\end{array}
$$

Note the only difference is that I added _{k=0} to the second line of the equation.

Expecting

Copy and paste the following code into this KaTeX demo tool to see how it should be rendered.

\[
\begin{array}{rcl}
E(X) & = & \displaystyle\sum_{k=0}^n k \cdot ({}_n C_k) p^k q^{n-k}\\\\
     & = & \displaystyle\sum_{k=0}
\end{array}
\]

Related links

• Reporting a bug
• How it should look like

Reproduction

bug.zip

Steps to reproduce

1. get the right dependencies

   mkdocs==1.5.3
   mkdocs-material-insiders==9.4.2
   

2. run mkdocs serve

Browser

Chrome

Before submitting

• I have read and followed the bug reporting guidelines.
• I have attached links to the documentation, and possibly related issues and discussions.
• I assure that I have removed all customizations before submitting this bug report.
• I have attached a .zip file with a minimal reproduction.