Added caption paramenter to sendDocument method

telegram/bot.py

@@ -421,6 +421,7 @@ class Bot(TelegramObject):
                      chat_id,
                      document,
                      filename=None,
+                     caption=None
                      **kwargs):
         """Use this method to send general files.
 
@@ -434,6 +435,9 @@ class Bot(TelegramObject):
           filename:
             File name that shows in telegram message (it is usefull when you
             send file generated by temp module, for example). [Optional]
+          caption:
+            Document caption (may also be used when resending documents by
+            file_id), 0-200 characters. [Optional]
 
         Keyword Args:
             disable_notification (Optional[bool]): Sends the message silently.
@@ -468,6 +472,8 @@ class Bot(TelegramObject):
 
         if filename:
             data['filename'] = filename
+        if caption:
+            data['caption'] = caption
 
         return url, data