Issue: "Cannot read property 'write' of undefined" with specific markdown.

[ReLater]

Describe the bug
Some files don't load in FM editor if they contain specific markdown for lists.

To Reproduce
Steps to reproduce the behavior:

• Open a md file in FM Dashboard.
• Enter following markdown wherever you want inside body of content file.:

- This is a weird list.
- - An item that's indented by 2 "- ".
- - Another item that's indented by 2 "- ".

• Save the file.

• Go back to FM Dashboard.

• Click again on file name.

• The file tabulator displays the content.

• The FM sidebar is loading endlessly (3 animated dots).

• Go to Etensions > "Front Matter"

• See tab "Runtime Status". Each time you perform the steps above, another entry appears:

Cannot read property 'write' of undefined

Expected behavior
FM sidebar loads even if the markdown code above is to be questioned. TBH: I don't know if that's invalid markdown code. Until today we hadn't issues with it.

Desktop (please complete the following information):

• OS: Win10
• VSCode: 1.64.2
• Front Matter v6.1.0

[estruyf]

Behaviour is a bit different on my end, but I've been able to reproduce it. It seems to be an issue with the - - tags. As you create two list items on the same line.

The right syntax should be:

- This is a weird list.
  - An item that's indented by 2 "- ".
  - Another item that's indented by 2 "- ".

For the SEO details, we get the Markdown syntax tree and this is where it fails. To make sure that it doesn't prevent the rendering of the panel, I implement a fix for this.

[estruyf]

Fix will be available in version v6.1.1