LaTeX new line with \\

[haltersweb]

Description

Notebook v7 does not recognize LaTeX double backslash to create new line. I had to roll back to 6.5.6 for it to work.

Reproduce

1. Open terminal

2. Install notebook v7 by typing pip install notebook or pip install notebook==7.0.4

3. Open a new notebook by typing jupyter notebook and then selecting New (Python page)

4. Change the cell to markdown

5. type the following:

$$
123\\
456
$$

7. Render the cell

Expected result:

123
456

Actual result:

123456

Context

Failure: Unsuccessful using notebook 7.0.4 on the following computers -- all LaTeX text ran together.
Success: Successful using notebook 6.5.6 on the following computers -- the LaTeX text showed on separate lines as expected.

MacBook Air M2, 2023
macOS Ventura 13.5.2
Browsers: Chrome, Safari
Python 3.10.13

MacBook Pro 2018
macOS Monterey v12.4
Browsers: Chrome, Safari (on notebook 7.0.4 the entire Jupyter Notebook interface didn't show up at all on Safari)
Python 3.10.8, 3.10.11

[RRosio]

Hi @haltersweb thank you for opening this issue. This has been previously reported in jupyterlab/jupyterlab#14570, and it is blocked by mathjax/MathJax#2312. As a workaround, you can try pip install jupyterlab-mathjax2.