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-rw-r--r--Lib/email/Header.py6
1 files changed, 3 insertions, 3 deletions
diff --git a/Lib/email/Header.py b/Lib/email/Header.py
index 624e7c4..76fffb5 100644
--- a/Lib/email/Header.py
+++ b/Lib/email/Header.py
@@ -215,11 +215,11 @@ class Header:
# charset. Only do this for the second and subsequent chunks.
nextcs = charset
if uchunks:
- if lastcs is not None:
- if nextcs is None or nextcs == 'us-ascii':
+ if lastcs not in (None, 'us-ascii'):
+ if nextcs in (None, 'us-ascii'):
uchunks.append(USPACE)
nextcs = None
- elif nextcs is not None and nextcs <> 'us-ascii':
+ elif nextcs not in (None, 'us-ascii'):
uchunks.append(USPACE)
lastcs = nextcs
uchunks.append(unicode(s, str(charset)))