How the ls command interpret this?

coreutils

From:	BaBa
Subject:	How the ls command interpret this?
Date:	Mon, 03 Jul 2017 18:16:00 +0200
User-agent:	Webmail Free/1.2.3

Hello,

touch a[b]
ls ?[b]

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How the ls command interpret this?, BaBa <=
- Re: How the ls command interpret this?, Eric Blake, 2017/07/03
  - Re: How the ls command interpret this?, BaBa, 2017/07/03
    - Re: How the ls command interpret this?, Reuti, 2017/07/30
    - Re: How the ls command interpret this?, Kaz Kylheku (Coreutils), 2017/07/30