merge #8344: [wikimedia] fix name & extension of files without an extension

gallery_dl/extractor/wikimedia.py

@@ -74,9 +74,7 @@ class WikimediaExtractor(BaseExtractor):
             m["name"]: m["value"]
             for m in image["commonmetadata"] or ()}
 
-        filename = image["canonicaltitle"]
-        image["filename"], _, image["extension"] = \
-            filename.partition(":")[2].rpartition(".")
+        text.nameext_from_url(image["canonicaltitle"].partition(":")[2], image)
         image["date"] = text.parse_datetime(
             image["timestamp"], "%Y-%m-%dT%H:%M:%SZ")