Created Forwarding messages (markdown)

Forwarding-messages.md

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+For some reason, [`ForwardMessageRequest`](https://lonamiwebs.github.io/Telethon/methods/messages/forward_message.html) (note it's *Message*, singular) does **not** seem to work.
+
+You should use [`ForwardMessagesRequest`](https://lonamiwebs.github.io/Telethon/methods/messages/forward_messages.html) (note it's _Message**s**_, plural) as follows:
+
+```python
+from telethon.utils import generate_random_long
+from telethon.helpers import get_input_peer
+
+messages = foo()  # Logic to retrieve a few messages.
+from_entity = bar()  # Who has the original messages.
+to_entity = baz()  # Who you want to forward them to.
+
+client.invoke(ForwardMessagesRequest(
+    from_peer=get_input_peer(from_entity),
+    id=[msg.id for msg in messages],
+    random_id=[generate_random_long() for _ in range(len(messages))],
+    to_peer=get_input_peer(to_entity)
+))
+```
+
+The named arguments are there for clarity, although they're not needed because they appear in order. You can obviously just wrap a single message on the list too, if that's all you have.