Catch unavailable chats in the getChat API call

That should have been done in botogram 0.3, but I forgot...

Fixes: GH-71

Author: Pietro Albini

botogram/api.py

@@ -22,6 +22,7 @@
     "sendVoice",
     "sendLocation",
     "sendChatAction",
+    "getChat",
 )
 
 

docs/api/bot.rst

@@ -377,6 +377,17 @@ components.
              for chat_id in BROADCAST_TO:
                  bot.chat(chat_id).send(to_send)
 
+      If your bot can't access the chat, an exception will be raised. Check out
+      the documentation about :ref:`unavailable chats <unavailable-chats>` to
+      learn more about that.
+
+      .. versionadded:: 0.3
+
+      .. versionchanged:: 0.3.3
+
+         If your bot can't access the chat, a ``ChatUnavailableError`` will be
+         raised.
+
    .. py:method:: send(chat, message[, preview=True, reply_to=None, syntax=None, extra=None, notify=True])
 
       This method sends a message to a specific chat. The chat must be

docs/changelog/0.3.rst

@@ -14,9 +14,12 @@ botogram 0.3.3
 
 *Bugfix release, not yet released*
 
+* Fix unavailable chats not detected when calling :py:meth:`botogram.Bot.chat`
+  (`issue 71`_)
 * Fix broken detection of unavailable chats, due to changes in the Bot API
   (`issue 72`_)
 
+.. _issue 71: https://github.com/pietroalbini/botogram/issues/71
 .. _issue 72: https://github.com/pietroalbini/botogram/issues/72
 
 .. _changelog-0.3.2: