fix incorrect indexing of words

Author: hmsklee

dist/tag/js/tag.min.js

@@ -34901,7 +34901,7 @@ var BratParser = function () {
             graph.words.push(word);
           });
         } else {
-          t.entity.idx = i;
+          t.entity.idx = graph.words.length;
         }
       });
       graph.words.sort(function (a, b) {

src/js/parse/ann.js

@@ -71,7 +71,7 @@ class BratParser {
           graph.words.push(word);
         });
       } else {
-        t.entity.idx = i;
+        t.entity.idx = graph.words.length;
       }
     });
     graph.words.sort((a, b) => a.idx - b.idx);