[Obsidian mode]: Improve formatting of task lists

favro_sync/favro_markdown.py

@@ -31,11 +31,19 @@ class CardFileFormatter:
     """Component for formatting and parsing card files."""
 
     def __init__(self, obsidian_mode=True):
+        """Initialize card formatter.
+
+        Arguments:
+        - `obsidian_mode`: Configure formatter to enable maximum compatibility
+          with [Obsidian](https://obsidian.md/). Enables internal links, and
+          exposes certain aliases.
+        """
         self.obsidian_mode = obsidian_mode
         self.markdown = marko.Markdown()
         self.renderer = marko.md_renderer.MarkdownRenderer()
 
     def format_card_contents(self, card: CardContents) -> str:
+        """Formats card contents. Mostly the inverse of [`parse_card_contents`]."""
         # Choose frontmatter data
         frontmatter_data = {}
         if self.obsidian_mode:
@@ -74,13 +82,18 @@ class CardFileFormatter:
             ls.append('\n\n')
 
         # Card contents
-        if card.description:
+        if description := card.description:
-            ls.append(card.description)
+            if self.obsidian_mode:
+                description = re.sub(r'\-\s*\[\s*\]', '- [ ]', description,
+                                     flags=re.MULTILINE)
+            ls.append(description)
+        del description
         fm = frontmatter.Post(''.join(ls), **frontmatter_data)
+
         return frontmatter.dumps(fm)
 
     def parse_card_contents(self, contents: str) -> CardContents:
-        """Parses card contents.
+        """Parses card contents. Mostly the inverse of [`parse_card_contents`].
 
         1. Strips frontmatter and parses certain fields from the header.
         2. Parses header

test/test_markdown_parsing.py

@@ -15,6 +15,9 @@ Test description
 1. Derp
 2. Derp
 3. Derp
+
+- [ ] Task 1
+- [ ] Task 2
 """.strip()
 
 EXAMPLE_TEXT_2 = """