Modify With oh-my-zsh shell part (#13556)
Modify With oh-my-zsh shell part (#13556)

* Modify With oh-my-zsh shell part

Tell user how to open the file and test whether it is successful.

* Update completion.md

Remove references to specific editors

Co-authored-by: Usha Mandya <63fc8324d194bb900191b7ad7215ea10fd135fb2@users.noreply.github.com>
thaJeztah/docker.github.io,thaJeztah/docker.github.io,docker/docker.github.io,thaJeztah/docker.github.io,thaJeztah/docker.github.io,docker/docker.github.io,thaJeztah/docker.github.io,docker/docker.github.io,docker/docker.github.io,docker/docker.github.io