[doc] fix "Telegram user" -> "telegram sticker"

zeehio · zeehio · commit 4e1597c614e4 · 2015-09-22T11:52:10.000+02:00
diff --git a/telegram/user.py b/telegram/user.py
@@ -23,7 +23,7 @@
 
 
 class User(TelegramObject):
-    """This object represents a Telegram Sticker.
+    """This object represents a Telegram User.
 
     Attributes:
         id (int):
