*** The function set-buffer-multibyte sets the flag in the current<BR>
buffer that says whether the buffer uses multibyte representation or
unibyte representation.  If the argument is nil, it selects unibyte
representation.  Otherwise it selects multibyte representation.
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This function does not change the contents of the buffer, viewed
as a sequence of bytes.  However, it does change the contents
viewed as characters; a sequence of two bytes which is treated as
one character when the buffer uses multibyte representation
will count as two characters using unibyte representation.
<P>
This function sets enable-multibyte-characters to record which
representation is in use.  It also adjusts various data in the buffer
(including its markers, overlays and text properties) so that they are
consistent with the new representation.
<P>