code: def shell_add_echo(script):
    
    new_script = ""
    for cmd in script.split('\n'):
      cmd = cmd.strip()
      if not cmd:
        continue
      new_script += "echo \\* " + shlex.quote(cmd) + "\n"
      new_script += cmd + "\n"
    return new_script
docs: Goes over each line script, adds "echo cmd" in front of each cmd.
  
    ls a
  
    becomes
  
    echo * ls a
    ls a