#14983: always add a line end after a MIME boundary marker.
This is more RFC compliant (see issue) and fixes a problem with
signature verifiers rejecting the part when signed. There is some
amount of backward compatibility concern here since it changes
the output, but the RFC issue coupled with fixing the problem
with signature verifiers seems worth the small risk of breaking
code that depends on the current incorrect output.
diff --git a/Misc/NEWS b/Misc/NEWS
index 5bf0af1..05413fe 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -42,6 +42,10 @@
Library
-------
+- Issue #14983: email.generator now always adds a line end after each MIME
+ boundary marker, instead of doing so only when there is an epilogue. This
+ fixes an RFC compliance bug and solves an issue with signed MIME parts.
+
- Issue #20013: Some imap servers disconnect if the current mailbox is
deleted, and imaplib did not handle that case gracefully. Now it
handles the 'bye' correctly.