end-before parameter thinks it has no argument

[flying-sheep]

What version of myst-parser are you using?

2.0.0

What version dependencies are you using?

accessible-pygments-0.0.4 anndata-0.10.6 array-api-compat-1.5.1 asttokens-2.4.1 attrs-23.2.0 beautifulsoup4-4.12.3 bleach-6.1.0 click-8.1.7 cloudpickle-3.0.0 comm-0.2.2 contourpy-1.2.0 cycler-0.12.1 dask-2024.3.1 debugpy-1.8.1 decorator-5.1.1 defusedxml-0.7.1 dill-0.3.8 executing-2.0.1 fastjsonschema-2.19.1 fonttools-4.50.0 fsspec-2024.3.1 greenlet-3.0.3 h5py-3.10.0 harmonypy-0.0.9 hnswlib-0.8.0 igraph-0.11.4 importlib_metadata-7.1.0 ipykernel-6.29.3 ipython-8.22.2 jedi-0.19.1 joblib-1.3.2 jsonschema-4.21.1 jsonschema-specifications-2023.12.1 jupyter-cache-1.0.0 jupyter-client-8.6.1 jupyter-core-5.7.2 jupyterlab-pygments-0.3.0 kiwisolver-1.4.5 legacy-api-wrap-1.4 leidenalg-0.10.2 llvmlite-0.42.0 locket-1.0.0 markdown-it-py-3.0.0 matplotlib-3.8.3 matplotlib-inline-0.1.6 mdit-py-plugins-0.4.0 mdurl-0.1.2 mistune-3.0.2 myst-nb-1.0.0 myst-parser-2.0.0 natsort-8.4.0 nbclient-0.10.0 nbconvert-7.16.3 nbformat-5.10.3 nbsphinx-0.9.3 nest-asyncio-1.6.0 networkx-3.2.1 numba-0.59.1 numpy-1.26.4 pandas-2.2.1 pandocfilters-1.5.1 parso-0.8.3 partd-1.4.1 patsy-0.5.6 pexpect-4.9.0 pillow-10.2.0 platformdirs-4.2.0 prompt-toolkit-3.0.43 psutil-5.9.8 ptyprocess-0.7.0 pure-eval-0.2.2 pydata-sphinx-theme-0.15.2 pynndescent-0.5.11 pyparsing-3.1.2 python-dateutil-2.9.0.post0 pytz-2024.1 pyyaml-6.0.1 pyzmq-25.1.2 readthedocs-sphinx-search-0.3.2 referencing-0.34.0 rpds-py-0.18.0 sam-algorithm-1.0.2 scanpy-1.10.0rc2.dev26+gfed1786 scanpydoc-0.13.4 scikit-learn-1.4.1.post1 scipy-1.12.0 seaborn-0.13.2 session-info-1.0.0 six-1.16.0 soupsieve-2.5 sphinx-autodoc-typehints-2.0.0 sphinx-book-theme-1.1.2 sphinx-copybutton-0.5.2 sphinx-design-0.5.0 sphinxext-opengraph-0.9.1 sqlalchemy-2.0.29 stack-data-0.6.3 statsmodels-0.14.1 stdlib_list-0.10.0 tabulate-0.9.0 texttable-1.7.0 threadpoolctl-3.4.0 tinycss2-1.2.1 toolz-0.12.1 tornado-6.4 tqdm-4.66.2 traitlets-5.14.2 typing-extensions-4.10.0 tzdata-2024.1 umap-learn-0.5.5 wcwidth-0.2.13 webencodings-0.5.1 zipp-3.18.1

What operating system are you using?

Linux

Describe the Bug

I can’t use the end-before parameter:

./index.md:1: WARNING: 'include': Invalid option value for 'end-before': None: argument required but none supplied [myst.directive_parse]

Expected Behavior

Works

To Reproduce

```{include} ../README.md
:end-before: ## Citation
```

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[chrisjsewell]

Hey @flying-sheep I think this may anyway be fixed by #796,
the problem is that in myst-parser 2.0.0, this is read as yaml, like so:

:end-before: ## Citation

and you can see that, because it start with an #, it is interpreted as a comment

what you need to do, is wrap it in quotes:

:end-before: "## Citation"

[flying-sheep]

OK, that seems to work, thanks! Weird that it’s YAML if you don’t actually use any YAML features. Why don’t you just parse it as raw text?