Re: shell-command - missing shell-quote-argument for program?

[Richard Stallman]

    C-h f shell RET

    "[...]
    The shell file name (sans directories) is used to make a symbol name
    such as `explicit-csh-args'.  If that symbol is a variable,
    its value is used as a list of arguments when invoking the shell.
    Otherwise, one argument `-i' is passed to the shell."

We should have a note about this to the doc string of explicit-bash-args,
so that people looking at it understand how it is used.
Would you please add one?