3 files changed, 5 insertions, 2 deletions
diff --git a/src/prompt_toolkit/contrib/telnet/log.py b/src/prompt_toolkit/contrib/telnet/log.py
index 0fe8433..476dffc 100644
--- a/src/prompt_toolkit/contrib/telnet/log.py
+++ b/src/prompt_toolkit/contrib/telnet/log.py
@@ -1,6 +1,7 @@
 """
 Python logger for the telnet server.
 """
+
 from __future__ import annotations
 
 import logging
diff --git a/src/prompt_toolkit/contrib/telnet/protocol.py b/src/prompt_toolkit/contrib/telnet/protocol.py
index 4b90e98..58286e2 100644
--- a/src/prompt_toolkit/contrib/telnet/protocol.py
+++ b/src/prompt_toolkit/contrib/telnet/protocol.py
@@ -4,6 +4,7 @@ specification, but sufficient for a command line interface.)
 
 Inspired by `Twisted.conch.telnet`.
 """
+
 from __future__ import annotations
 
 import struct
diff --git a/src/prompt_toolkit/contrib/telnet/server.py b/src/prompt_toolkit/contrib/telnet/server.py
index 9ebe66c..69e9a88 100644
--- a/src/prompt_toolkit/contrib/telnet/server.py
+++ b/src/prompt_toolkit/contrib/telnet/server.py
@@ -1,6 +1,7 @@
 """
 Telnet server.
 """
+
 from __future__ import annotations
 
 import asyncio
@@ -99,7 +100,7 @@ class _ConnectionStdout:
             if not self._closed:
                 self._connection.send(b"".join(self._buffer))
         except OSError as e:
-            logger.warning("Couldn't send data over socket: %s" % e)
+            logger.warning(f"Couldn't send data over socket: {e}")
 
         self._buffer = []
 
@@ -416,7 +417,7 @@ class TelnetServer:
                 # Unhandled control-c propagated by a prompt.
                 logger.info("Unhandled KeyboardInterrupt in telnet application.")
             except BaseException as e:
-                print("Got %s" % type(e).__name__, e)
+                print(f"Got {type(e).__name__}", e)
                 import traceback
 
                 traceback.print_exc()