fix: ship the real DTD in the Pelican plugin

pelican-mews/tests/conftest.py

@@ -21,7 +21,15 @@ THEME = TESTS / "theme"
 
 BASE_SETTINGS = {
     "ARTICLE_PATHS": [],
-    "MARKDOWN": {"output_format": "xhtml"},
+    # Tables and definition lists are both in the Mews subset, and both need
+    # an extension turned on before python-markdown will emit them.
+    "MARKDOWN": {
+        "output_format": "xhtml",
+        "extension_configs": {
+            "markdown.extensions.tables": {},
+            "markdown.extensions.def_list": {},
+        },
+    },
     "PAGE_PATHS": ["pages"],
     "PAGE_SAVE_AS": "{slug}.xhtml",
     "PAGE_URL": "{slug}.xhtml",