Make exception types correspond to Python docs

telethon/tl/custom/draft.py

@@ -21,7 +21,7 @@ class Draft:
     @classmethod
     def _from_update(cls, client, update):
         if not isinstance(update, UpdateDraftMessage):
-            raise ValueError(
+            raise TypeError(
                 'You can only create a new `Draft` from a corresponding '
                 '`UpdateDraftMessage` object.'
             )

telethon/tl/tlobject.py

@@ -97,7 +97,8 @@ class TLObject:
             if isinstance(data, str):
                 data = data.encode('utf-8')
             else:
-                raise ValueError('bytes or str expected, not', type(data))
+                raise TypeError(
+                    'bytes or str expected, not {}'.format(type(data)))
 
         r = []
         if len(data) < 254: