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-rw-r--r--src/waitress/utilities.py4
1 files changed, 2 insertions, 2 deletions
diff --git a/src/waitress/utilities.py b/src/waitress/utilities.py
index a9d3361..164752f 100644
--- a/src/waitress/utilities.py
+++ b/src/waitress/utilities.py
@@ -259,8 +259,8 @@ class Error:
self.body = body
def to_response(self):
- status = "%s %s" % (self.code, self.reason)
- body = "%s\r\n\r\n%s" % (self.reason, self.body)
+ status = f"{self.code} {self.reason}"
+ body = f"{self.reason}\r\n\r\n{self.body}"
tag = "\r\n\r\n(generated by waitress)"
body = (body + tag).encode("utf-8")
headers = [("Content-Type", "text/plain; charset=utf-8")]