bug#47857: fill-paragraph vs. FULLWIDTH DIGITs: bug exposed

[Eli Zaretskii]

> From: 積丹尼 Dan Jacobson
>  <jidanni@jidanni.org>
> Date: Sun, 18 Apr 2021 09:06:55 +0800
> 
> Disaster! M-q runs the command fill-paragraph
> 
> And turns:
> 
> Today's lucky number(s)!:
> ９
> １０
> １１
> 
> Into:
> 
> Today's lucky number(s)!:９１０１１
> 
> OK, if it is so smart, then why doesn't it also turn:
> 
> Today's lucky number(s)!: ９ １０ １１
> 
> into:
> 
> Today's lucky number(s)!:９１０１１
> 
> Well, surprise, it was actually very happy with ９ １０ １１ all along.
> 
> OK, let's add some space:
> Today's lucky number(s)!: ９         １０ １１
> becomes:
> Today's lucky number(s)!: ９ １０ １１
> perfect.
> 
> Anyway if it were stable in its output, then one would always get the same
> results. Bug exposed!

I don't see any bug here.  This is the documented behavior: filling
deletes any excess whitespace, so 2 or more consecutive SPC characters
are squeezed to a single SPC.  All the rest is a typical jidanni-style
hysteria.