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 re-
       moved.  An argument of the form `+n' identifies  a  stack  entry  by
       counting from the left of the list shown by the dirs command, start-
       ing  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 interactive user.
