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,
       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.
