Describe the bug

My preferred editor is mg and it leaves backup files in the current working directory by default. I prefer to disable that feature with the -n flag, so my EDITOR environment variable is mg -n.

This issue occurs with all editors when passing flags, such as vi.

My use-case can be worked around by using a configuration file and to set my EDITOR environment to mg:

echo "make-backup-files 0\n" | save -a ~/.mg
$env.config.buffer_editor = "mg"
config nu # now works

How to reproduce

1. Set an editor with a flag: $env.config.buffer_editor = "vi -C"
2. Call a command that uses the default editor: config nu
3. The following error is printed:

Error: nu::shell::external_command

  × External command failed
   ╭─[entry #58:1:1]
 1 │ config nu
   · ────┬────
   ·     ╰── `vi -C` not found
   ╰────
  help: Failed to find the editor executable

Expected behavior

nushell should search for the vi editor and pass it the -C flag instead of looking for an executable named vi -C.

Configuration