fix(#56): narrowly scope escape_deflist (#57)

Author: KyleKing

mdformat_mkdocs/mdit_plugins/_material_deflist.py

@@ -17,7 +17,7 @@
     ut eros sed sapien ullamcorper consequat. Nunc ligula ante.
 
     Duis mollis est eget nibh volutpat, fermentum aliquet dui mollis.
-    Nam vulputate tincidunt fringilla.
+    Vulputate tincidunt fringilla.
     Nullam dignissim ultrices urna non auctor.
 ```
 
@@ -28,6 +28,7 @@
 
 from __future__ import annotations
 
+import re
 from typing import TYPE_CHECKING
 
 from markdown_it import MarkdownIt
@@ -106,6 +107,7 @@ def escape_deflist(
     context: RenderContext,  # noqa: ARG001
 ) -> str:
     """Escape line starting ":" which would otherwise be parsed as a definition list."""
+    pattern = re.compile(r"^[:~] ")
     return "\n".join(
-        "\\" + line if line.startswith(":") else line for line in text.split("\n")
+        "\\" + line if pattern.match(line) else line for line in text.split("\n")
     )

tests/format/fixtures/regression.md

@@ -0,0 +1,6 @@
+Prevent regression with non-deflists: https://github.com/KyleKing/mdformat-mkdocs/issues/56
+.
+::: my_lib.core
+.
+::: my_lib.core
+.

tests/format/test_format.py

@@ -27,6 +27,7 @@ def flatten(nested_list: list[list[T]]) -> list[T]:
             "pymd_abbreviations.md",
             "pymd_snippet.md",
             "python_markdown_attr_list.md",
+            "regression.md",
             "text.md",
         )
     ],