The --prefix option takes a separate argument, not an attached
argument.
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
The \c{--prefix} and \c{--postfix} options prepend or append
(respectively) the given argument to all \c{global} or
-\c{extern} variables. E.g. \c{--prefix_} will prepend the
+\c{extern} variables. E.g. \c{--prefix _} will prepend the
underscore to all global and external variables, as C sometimes
(but not always) likes it.