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.
