Subject: dabbrev-expand vs. ： vs. :
From: 積丹尼 Dan Jacobson <[email-masked]>
To: [email-masked]
Date: Fri, 25 Jun 2021 03:31:34 +0800
List-Id: <debbugs-submit.debbugs.gnu.org>

Unfair! dabbrev-expand only expands boys names
1. 名：[email-masked]
2. 名:[email-masked]
... when girls are behind wider colons.
Try it:
l M-/
r M-/