bug#25432: U+3001 IDEOGRAPHIC COMMA is punctuation

[Eli Zaretskii]

> From: 積丹尼 Dan Jacobson
>       <jidanni@jidanni.org>
> Date: Fri, 13 Jan 2017 08:05:12 +0800
> 
> M-/ (translated from <escape> /) runs the command dabbrev-expand
> 
> But when I do ESC / here,
> 
> 阿G信> 想向您請教，新北市消防局 北海頻率、Talkgroup、顏色碼、slot
> 
> 至於 Talkg<ESC />
> 
> I get
> Scanning for dabbrevs...done
> user-error: No dynamic expansion for ‘Talkg’ found
> 
> That's because "、" is not being treated like a (type of a) comma as it
> should.

No, that's because by default M-/ searches for symbol-constituent
characters, and 、 can be part of a symbol.  If you don't like that,
customize dabbrev-abbrev-char-regexp to just "\\sw".

IOW, this is a feature: Emacs is primarily a programmer's editor, so
its defaults are supposed to be tuned for that.