haracter literals can now use a variety of escape
sequences.
</p>
<li><p>Block and datum comments have been added.
</p>
<li><p>The <tt><tt>#</tt>!r6rs</tt> comment for marking report-compliant
lexical syntax has been added.
</p>
<li><p>Characters are now specified to correspond to Unicode scalar
values.
</p>
<li><p>Many of the procedures and syntactic forms of the language are
now part of the <tt>(rnrs base (6))</tt> library.  Some procedures and
syntactic forms have been moved to other libraries; see figur