From bfba67ccd9de5706916ff1ff8efdf862e72bacde Mon Sep 17 00:00:00 2001
From: Neil Booth <kyuupichan@gmail.com>
Date: Sun, 3 Feb 2019 15:01:17 +0800
Subject: [PATCH] Add missing f

---
 electrumx/server/session.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/electrumx/server/session.py b/electrumx/server/session.py
index 6010cd6..d5fbd45 100644
--- a/electrumx/server/session.py
+++ b/electrumx/server/session.py
@@ -1149,7 +1149,7 @@ class ElectrumX(SessionBase):
                 msg = self.coin.upgrade_required(client_ver)
                 if msg:
                     self.logger.info(f'sent tx: {hex_hash}. and warned user to upgrade their '
-                                     'client from {self.client}')
+                                     f'client from {self.client}')
                     return msg
 
             self.logger.info(f'sent tx: {hex_hash}')