@quotation
Streams are @emph{not} created bivalent by default for performance
reasons. Bivalent streams are incompatible with
-@code{fast-read-char}, an internal optimization in sbcl's stream
+@code{fast-read-char}, an internal optimization in SBCL's stream
machinery that bulk-converts octets to characters and implements a
fast path through @code{read-char}.
@end quotation