esolve to \n (for any character "n" that
is not a backslash or single resp. double quote).

Instead of "cmdline", you may specify "argv" as an array ("cmdline"
overrides "argv"). This array should *not* include "perl" as the
first element; this is added automatically.

So that it can be displayed in the input box, the "argv" array
will be encoded into a single string - this means that if you want
full control over the formatting of the command line as it is
displayed to the user in the editor, use "cmdline"