diff --git a/docs/source/conf.py b/docs/source/conf.py
index 44bd4400cd5..40f7dd411d4 100644
--- a/docs/source/conf.py
+++ b/docs/source/conf.py
@@ -140,12 +140,6 @@
         "admonition-title-font-size": "0.95rem",
         "admonition-font-size": "0.92rem",
     },
-    "announcement": (
-        "PTB has undergone significant changes in v20. Please read the documentation "
-        "carefully and also check out the transition guide in the "
-        '<a href="https://github.com/python-telegram-bot/python-telegram-bot/wiki/'
-        'Transition-guide-to-Version-20.0">wiki</a>.'
-    ),
     "footer_icons": [
         {
             # Telegram channel logo
diff --git a/telegram/_bot.py b/telegram/_bot.py
index f9682f58b86..5615e146949 100644
--- a/telegram/_bot.py
+++ b/telegram/_bot.py
@@ -7176,7 +7176,7 @@ async def set_my_default_administrator_rights(
     ) -> bool:
         """Use this method to change the default administrator rights requested by the bot when
         it's added as an administrator to groups or channels. These rights will be suggested to
-        users, but they are are free to modify the list before adding the bot.
+        users, but they are free to modify the list before adding the bot.
 
         .. seealso:: :meth:`get_my_default_administrator_rights`
 
diff --git a/telegram/constants.py b/telegram/constants.py
index c43ed6d130d..cf5b54046d2 100644
--- a/telegram/constants.py
+++ b/telegram/constants.py
@@ -1690,8 +1690,12 @@ class MessageOriginType(StringEnum):
 
 
 class MessageType(StringEnum):
-    """This enum contains the available types of :class:`telegram.Message`. The enum
-    members of this enumeration are instances of :class:`str` and can be treated as such.
+    """This enum contains the available types of :class:`telegram.Message`. Here, a "type" means
+    a kind of message that is visually distinct from other kinds of messages in the Telegram app.
+    In particular, auxiliary attributes that can be present for multiple types of messages are
+    not considered in this enumeration.
+
+    The enum members of this enumeration are instances of :class:`str` and can be treated as such.
 
     .. versionadded:: 20.0
     """
diff --git a/tests/ext/test_updater.py b/tests/ext/test_updater.py
index 808eaef62f1..feed189c662 100644
--- a/tests/ext/test_updater.py
+++ b/tests/ext/test_updater.py
@@ -1049,7 +1049,7 @@ async def return_true(*args, **kwargs):
             assert updater.running is False
 
     async def test_webhook_ssl_just_for_telegram(self, monkeypatch, updater):
-        """Here we just test that the SSL info is pased to Telegram, but __not__ to the the
+        """Here we just test that the SSL info is pased to Telegram, but __not__ to the
         webhook server"""
 
         async def set_webhook(**kwargs):