popd [ -q ] [ {+|-}n ]
       Remove an entry from the directory stack, and perform a cd to the
       new  top  directory.   With no argument, the current top entry is
       removed.  An argument of the form `+n' identifies a  stack  entry
       by  counting from the left of the list shown by the dirs command,
       starting with zero.  An argument of the form -n counts  from  the
       right.  If the PUSHD_MINUS option is set, the meanings of `+' and
       `-' in this context are swapped.

       If  the  -q  (quiet) option is specified, the hook function chpwd
       and the functions in the array $chpwd_functions are  not  called,
       and  the  new directory stack is not printed.  This is useful for
       calls to popd that do not change the environment seen by  an  in-
       teractive user.
