Update to Mistune v3 (#1820)

jupyter · Jun 16, 2023 · 60af6d8 · 60af6d8
1 parent 0a53820
commit 60af6d8
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Showing 3 changed files with 332 additions and 161 deletions.
diff --git a/nbconvert/filters/markdown.py b/nbconvert/filters/markdown.py
@@ -11,13 +11,14 @@
 
 try:
     from .markdown_mistune import markdown2html_mistune
+
 except ImportError as e:
-    # store in variable for Python 3
     _mistune_import_error = e
 
-    def markdown2html_mistune(source):
+    def markdown2html_mistune(source: str) -> str:
         """mistune is unavailable, raise ImportError"""
-        raise ImportError("markdown2html requires mistune: %s" % _mistune_import_error)
+        msg = f"markdown2html requires mistune: {_mistune_import_error}"
+        raise ImportError(msg)
 
 
 from .pandoc import convert_pandoc