Fixes "data-id" which should have been "id".

Author: gkellogg

spec/index.html

@@ -1055,7 +1055,7 @@ <h4 style="padding-bottom:0; margin-bottom:0;">Triple Production</h4>
     <section id="reifier">
       <h4>Reifiers</h4>
 
-      <p data-id="reifier-tests" data-tests="
+      <p id="reifier-tests" data-tests="
         syntax/index.html#trig12-ann-5,
         syntax/index.html#trig12-ann-6,
         syntax/index.html#trig12-ann-7,