markdown equation rendering is suppressed if preceded by fenced code block

[stevengj]

The following issue was reported in JuliaLang/IJulia.jl#1096, but is also reproducible with the Python kernel, so it seems to be an issue of the Jupyter notebook front end.

Basically, under some circumstances the rendering of LaTeX equations in Markdown text is suppressed if the text is preceded by a fenced code block. A minimal reproducer is:

from IPython.display import display, Markdown
display(Markdown('''
```
foo
```

Some maths: $\sqrt{1 + x}$.
'''))

which is rendered in my Jupyter (6.5.4) notebook as follows, without LaTeX math formatting:

If I simply remove the fenced code block from the beginning of the Markdown string, then the equation renders correctly:

[RRosio]

Thank you for opening this issue @stevengj. Would you be able to try this in Notebook 7 to see if you encounter this issue?

[stevengj]

I don't have version 7 of the notebook in my conda-forge installation, even after updating. jupyter --version gives:

Selected Jupyter core packages...
IPython          : 7.31.1
ipykernel        : 6.15.2
ipywidgets       : 7.6.5
jupyter_client   : 7.4.9
jupyter_core     : 4.11.1
jupyter_server   : 1.23.4
jupyterlab       : 3.5.3
nbclient         : 0.5.13
nbconvert        : 6.5.4
nbformat         : 5.7.0
notebook         : 6.5.2
qtconsole        : 5.4.0
traitlets        : 5.7.1

However, it works fine in JupyterLab 3.5.3:

Can someone with Jupyter Notebook 7.x try pasting in the code and see whether it works?

[jtpio]

@stevengj this is what it looks like with Notebook 7.0.6 (the latest release at the moment):

[stevengj]

Ok, great, it's fixed in the latest version? In that case I guess this issue can be closed?

[JasonWeill]

Closing because this is fixed in Notebook 7. Thanks for your help, @stevengj !