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-rw-r--r--Lib/http/cookies.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/Lib/http/cookies.py b/Lib/http/cookies.py
index fda02b7..dbddd6c 100644
--- a/Lib/http/cookies.py
+++ b/Lib/http/cookies.py
@@ -174,7 +174,7 @@ _Translator.update({
ord('\\'): '\\\\',
})
-_is_legal_key = re.compile('[%s]+' % _LegalChars).fullmatch
+_is_legal_key = re.compile('[%s]+' % re.escape(_LegalChars)).fullmatch
def _quote(str):
r"""Quote a string for use in a cookie header.