🐛 FIX: _Entities.__contains__ (#69)

Author: hukkinj1

markdown_it/common/entities.py

@@ -15,7 +15,7 @@ def __getitem__(self, name):
         return DATA[name]
 
     def __contains__(self, name):
-        name in DATA
+        return name in DATA
 
 
 entities = _Entities()