Comment 0 for bug 1891785

tmux bi w choose-t -wF'#{==:#{window_index},2}' #this shows 0 on windows other than window 2:
(0) - 0: 1
(1) ├─> 0: 0
(2) ├─> 1: 0
(3) ├─> 2: 1
(4) ├─> 3: 0

tmux bi w choose-t -wf'#{==:#{window_index},2}' #so this eliminates windows other than window 2:
(0) - 0: 6 windows (attached)
(1) └─> 2: ssh* (1 panes) "e540"

tmux bi w choose-t -wF'#{window_format}' #this shows 0 on the session line and 1 on each window:
(0) - 0: 0
(1) ├─> 0: 1
(2) ├─> 1: 1
(3) ├─> 2: 1
(4) ├─> 3: 1

tmux bi w choose-t -wf'#{window_format}' #so this ought to eliminate the session line, and restore choose-window alignment, but doesn't:
(0) - 0: 4 windows (attached)
(1) ├─> 0: man- (1 panes) "e540"
(2) ├─> 1: bash (1 panes) "e540"
(3) ├─> 2: ssh* (1 panes) "e540"
(4) ├─> 3: bash (1 panes) "e540"

if it did, then my choose-window list could be properly aligned as it is
on centos7 (tmux-1.8-4.el7.x86_64):
(0) 0: htop "umari"
(1) 1: bash "umari"
(2) 2: bash- "umari"
(3) 3: bash* "umari"

and ubuntu xenial (tmux 2.1-3build1):
(0) 0: [tmux]- "jocur"
(1) 1: bash* "jocur"

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: tmux 3.0a-2
ProcVersionSignature: Ubuntu 5.4.0-42.46-generic 5.4.44
Uname: Linux 5.4.0-42-generic x86_64
ApportVersion: 2.20.11-0ubuntu27.4
Architecture: amd64
CasperMD5CheckResult: skip
Date: Sat Aug 15 21:05:07 2020
InstallationDate: Installed on 2020-03-15 (153 days ago)
InstallationMedia: Lubuntu 20.04 LTS "Focal Fossa" - Alpha amd64 (20200314)
ProcEnviron:
 LC_TIME=en_DK.utf8
 TERM=screen
 PATH=(custom, no user)
 LANG=en_US.utf8
 SHELL=/bin/bash
SourcePackage: tmux
UpgradeStatus: No upgrade log present (probably fresh install)