The attached screenshot shows a line in my Folder buffer for a message that was posted to the Emacs bug tracker. Notice that there is some whitespace between the author's truncated name and the "]". What's more important is that the "]" hides the "b" in "bug". (The actual subject is "bug#51852: Gnus: Add User-Defined Spec example".) This is with Emacs 28.1, Athena widgets.
MH-E 8.6+git
MH-E compilation details:
Byte compiled: yes
Gnus (compile-time): Gnus v5.13
Gnus (run-time): Gnus v5.13
GNU Emacs 28.1 (build 1, x86_64-pc-linux-gnu, X toolkit, cairo version 1.16.0, Xaw scroll bars)
of 2022-04-06
nmh 1.7.1
mh-progs: /usr/bin/mh
mh-lib: /etc/nmh
mh-lib-progs: /usr/lib/mh
Linux alto 5.10.0-15-amd64 #1 SMP Debian 5.10.120-1 (2022-06-09) x86_64 GNU/Linux
The raw email is attached as email.eml.
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