Update megawika.py

megawika.py

@@ -96,7 +96,7 @@ with urllib.request.urlopen(file_list_url) as f:
 
 _DATA_URL = fnames['fnames']
 
-_VARIANTS = ["all"] + list(_DATA_URL.keys())
+_VARIANTS = ["default"] + list(_DATA_URL.keys())
 
 
 class MegaWika(datasets.GeneratorBasedBuilder):
@@ -168,7 +168,7 @@ class MegaWika(datasets.GeneratorBasedBuilder):
         )
 
     def _split_generators(self, dl_manager):
-        if self.config.name == "all":
+        if self.config.name == "default":
             data_sources = _DATA_URL
         else:
             data_sources = {self.config.name: _DATA_URL[self.config.name]}