notaccent in unicode-math

Author: davidcarlisle

unicode.xml

@@ -7803,7 +7803,7 @@ Barbara Beeton for the STIX project
          <unicodedata category="Mn" combclass="1" bidi="NSM" mirror="N" unicode1="NON-SPACING LONG SLASH OVERLAY" mathclass="D" alias="long slash overlay"/>
          <noncombref style="over" ref="U002F"/>
          <latex>{\fontencoding{LECO}\selectfont\char216}</latex>
-         <mathlatex set="unicode-math">\not</mathlatex>
+         <mathlatex set="unicode-math">\notaccent</mathlatex>
          <Elsevier grid="caz" ent="z.cansls">
             <desc>cancellation slash  (overlay)</desc>
          </Elsevier>