Subject: bug#68688: 30.0.50; next-line-completion doesn't work with multiline completions

From: Juri Linkov <[email-masked]>
Date: Thu, 25 Jan 2024 19:52:19 +0200

While testing, I found an old bug where group lines prevented from
moving horizontally, such as moving from aa2 to ac2:

  > Group 1
              aa1   aa2   aa3
              aa4
  > Group 2
              ab1
  > Group 3
              ac1   ac2

The fix was very simple, and I updated the group test as well.