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When I start emacs -q and run M-x shell there is formatting error when connecting to docker container as follows,

$ docker container exec -it b3c85fd9c5eaa2e64fc5aac9025d1f9c3b3fe47ca39008f40ddd436338d755f5 bash
]0;root@b3c85fd9c5ea: /root@b3c85fd9c5ea:/# ls
ls
bin   dev  home  lib64  mnt  proc  run   srv  tmp  var
boot  etc  lib   media  opt  root  sbin  sys  usr
]0;root@b3c85fd9c5ea: /root@b3c85fd9c5ea:/# 

Here is its screenshot

enter image description here

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Your value of PS1 contains ANSI escape codes that can only be processed correctly by a terminal emulator (like the built-in term.el or vterm), not by M-x shell or M-x eshell. Set it to something simpler like \u@\h:\w\$, this could be done with the -e switch for the docker-container-exec command.

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