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
       interactive user.
