Fix copy pasted docs and snake_case files

telethon/client/uploads.py

@@ -274,7 +274,7 @@ class UploadMethods(ButtonMethods, MessageParseMethods, UserMethods):
 
         Returns:
             :tl:`InputFileBig` if the file size is larger than 10MB,
-            `telethon.tl.custom.input_sized_file.InputSizedFile`
+            `telethon.tl.custom.inputsizedfile.InputSizedFile`
             (subclass of :tl:`InputFile`) otherwise.
         """
         if isinstance(file, (types.InputFile, types.InputFileBig)):

telethon/tl/custom/__init__.py

@@ -1,6 +1,6 @@
 from .draft import Draft
 from .dialog import Dialog
-from .input_sized_file import InputSizedFile
+from .inputsizedfile import InputSizedFile
 from .messagebutton import MessageButton
 from .forward import Forward
 from .message import Message

telethon/tl/custom/messagebutton.py

@@ -5,9 +5,9 @@ import webbrowser
 
 class MessageButton:
     """
-    Custom class that encapsulates a message providing an abstraction to
-    easily access some commonly needed features (such as the markdown text
-    or the text for a given message entity).
+    Custom class that encapsulates a message button providing
+    an abstraction to easily access some commonly needed features
+    (such as clicking the button itself).
 
     Attributes: