From 00ce1222d90ca28c6096d847c6ffe52e26bd5db2 Mon Sep 17 00:00:00 2001
From: "Jason R. Coombs" <jaraco@jaraco.com>
Date: Sun, 31 May 2020 08:43:36 -0400
Subject: Restore Python 3.5 syntax compatibility in distutils.dist.

---
 distutils/dist.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/distutils/dist.py b/distutils/dist.py
index 6cf0a0d6..37db4d6c 100644
--- a/distutils/dist.py
+++ b/distutils/dist.py
@@ -35,7 +35,8 @@ def _ensure_list(value, fieldname):
     elif not isinstance(value, list):
         # passing a tuple or an iterator perhaps, warn and convert
         typename = type(value).__name__
-        msg = f"Warning: '{fieldname}' should be a list, got type '{typename}'"
+        msg = "Warning: '{fieldname}' should be a list, got type '{typename}'"
+        msg = msg.format(**locals())
         log.log(log.WARN, msg)
         value = list(value)
     return value
-- 
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