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-rw-r--r--src/waitress/utilities.py3
1 files changed, 2 insertions, 1 deletions
diff --git a/src/waitress/utilities.py b/src/waitress/utilities.py
index b0199d0..92db147 100644
--- a/src/waitress/utilities.py
+++ b/src/waitress/utilities.py
@@ -261,7 +261,8 @@ class Error:
def to_response(self,ident=None):
status = f"{self.code} {self.reason}"
body = f"{self.reason}\r\n\r\n{self.body}"
- tag = "\r\n\r\n(generated by "+ident+")" if ident else "\r\n\r\n(generated by server)"
+ ident = ident if ident else "server"
+ tag = f"\r\n\r\n(generated by {ident})"
body = (body + tag).encode("utf-8")
headers = [("Content-Type", "text/plain; charset=utf-8")]