#14291: if a header has non-ascii unicode, default to CTE using utf-8
In Python2, if a unicode string was assigned as the value of a header,
email would automatically CTE encode it using the UTF8 charset.
This capability was lost in the Python3 translation, and this patch
restores it.
Patch by Ali Ikinci, assisted by R. David Murray.
I also added a fix for the mailbox test that was depending (with a comment
that it was a bad idea to so depend) on non-ASCII causing message_from_string
to raise an error. It now uses support.patch to induce an error during
message serialization.
diff --git a/Misc/NEWS b/Misc/NEWS
index eea3a17..b4dcf82 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -22,6 +22,9 @@
Library
-------
+- Issue #14291: Email now defaults to utf-8 for non-ASCII unicode headers
+ instead of raising an error. This fixes a regression relative to 2.7.
+
- Issue #5219: Prevent event handler cascade in IDLE.
- Issue #14184: Increase the default stack size for secondary threads on