+;;; FIXME: Wouldn't it be clearer to just have the structure
+;;; definition be DEFSTRUCT FILE-STREAM (instead of DEFSTRUCT
+;;; FD-STREAM)? That way we'd have TYPE-OF and PRINT-OBJECT refer to
+;;; these objects as FILE-STREAMs (the ANSI name) instead of the
+;;; internal implementation name FD-STREAM, and there might be other
+;;; benefits as well.