Remove removesuffix

python · Aug 2, 2024 · c42cbdc · c42cbdc
1 parent 7725541
commit c42cbdc
Showing 1 changed file with 4 additions and 1 deletion.
diff --git a/Lib/email/generator.py b/Lib/email/generator.py
@@ -231,7 +231,10 @@ def _write_headers(self, msg):
                 if not folded.endswith(self.policy.linesep):
                     raise HeaderWriteError(
                         f'folded header does not end with {linesep!r}: {folded!r}')
-                if NEWLINE_WITHOUT_FWSP.search(folded.removesuffix(linesep)):
+                folded_no_linesep = folded
+                if folded.endswith(linesep):
+                    folded_no_linesep = folded[:-len(linesep)]
+                if NEWLINE_WITHOUT_FWSP.search(folded_no_linesep):
                     raise HeaderWriteError(
                         f'folded header contains newline: {folded!r}')
             self.write(folded)