GitHub markdown for lists displays incorrectly

[lhriley]

I noticed that when creating a list, the preview in Remarkable when using the Github (Default) style does not match the Github Markdown Styleguide. This applies to ordered, unordered, and mixed order lists.

Remarkable version 1.87
Linux Mint 18.1

This works in Github:

Example 1:

• Dashes work just as well
• And if you have sub points, put two spaces before the dash or star:
  • Like this
  • And this

Example 2:

1. line 1
2. line 2
   1. line 2.1
3. line 3
   • line 3.*

---

However renders like this in Remarkable:

Example 1:

• Dashes work just as well
• And if you have sub points, put two spaces before the dash or star:
• Like this
• And this

Example 2:

• line 1
• line 2
• line 2.1
• line 3
• line 3.*

---

Markup:

Example 1:

- Dashes work just as well
- And if you have sub points, put two spaces before the dash or star:
  - Like this
  - And this

Example 2:

1. line 1
2. line 2
   1. line 2.1
3. line 3
   * line 3.*

[vphantom]

I played with this bug, and it appears that Remarkable expects 4 spaces per indent level, whereas GitHub only needs 2 spaces.

[vphantom]

According to python-markdown #451, the Markdown standard specifies 4 spaces and GitHub is breaching it with its 2 spaces. We must set tab_length to 2 instead of the default 4 when in GitHub mode to work around this.

Seems to me like self.default_extensions in remarkable/RemarkableWindow.py should conditionally contain tab_length=2 if self.style=="github". Problem is, this would mean re-initializing markdown whenever the CSS is changed, which is non trivial. I'm not a Python programmer so I guess this is where I must stop my effort.