write-byte byte stream => byte Arguments and Values: byte---an
integer of the stream element type of stream. stream---a binary
output stream. write-byte writes one byte, byte, to stream.
(with-open-file (s "temp-bytes" :direction :output :element-type
'unsigned-byte) (write-byte 101 s)) => 101 stream is modified.
The element type of the stream. Should signal an error of type
type-error if stream is not a stream. Should signal an error of
type error if stream is not a binary output stream. Might signal
an error of type type-error if byte is not an integer of the
stream element type of stream. read-byte, write-char, write-
sequence