add diagup/down to match wspr/unicode-math/commit/c031af9dcbf859e5a3d5e3d2528452c5340b03a5

Author: davidcarlisle

docs/unicode-names.js

@@ -9264,9 +9264,9 @@ var nms=[];
  nms[10184]='REVERSE SOLIDUS PRECEDING SUBSET     ⟈ \\bsolhsub';
  nms[10185]='SUPERSET PRECEDING SOLIDUS     ⟉ \\suphsol';
  nms[10186]='VERTICAL BAR WITH HORIZONTAL STROKE';
- nms[10187]='MATHEMATICAL RISING DIAGONAL';
+ nms[10187]='MATHEMATICAL RISING DIAGONAL     \\diagup';
  nms[10188]='LONG DIVISION     \\longdivision';
- nms[10189]='MATHEMATICAL FALLING DIAGONAL';
+ nms[10189]='MATHEMATICAL FALLING DIAGONAL     \\diagdown';
  nms[10190]='SQUARED LOGICAL AND';
  nms[10191]='SQUARED LOGICAL OR';
  nms[10192]='WHITE DIAMOND WITH CENTRED DOT     \\diamondcdot';

unicode.xml

@@ -56168,6 +56168,7 @@ Barbara Beeton for the STIX project
       </character>
       <character id="U027CB" dec="10187">
          <unicodedata category="Sm" combclass="0" bidi="ON" mirror="Y" mathclass="R"/>
+         <mathlatex set="unicode-math">\diagup</mathlatex>
          <operator-dictionary form="infix" lspace="3" rspace="3" priority="680"/>
          <description unicode="6.1">MATHEMATICAL RISING DIAGONAL</description>
       </character>
@@ -56178,6 +56179,7 @@ Barbara Beeton for the STIX project
       </character>
       <character id="U027CD" dec="10189">
          <unicodedata category="Sm" combclass="0" bidi="ON" mirror="Y" mathclass="R"/>
+         <mathlatex set="unicode-math">\diagdown</mathlatex>
          <operator-dictionary form="infix" lspace="3" rspace="3" priority="680"/>
          <description unicode="6.1">MATHEMATICAL FALLING DIAGONAL</description>
       </character>