Add emptyIndex to the output format for CoreLabel and IndexedWord if they use one of the INDEX outputs. No effect for words which don't have those annotations, which will be most words outside of Semgrex usage

Author: AngledLuffa

src/edu/stanford/nlp/ling/CoreLabel.java

@@ -759,6 +759,10 @@ public String toString(OutputFormat format) {
       if (index != null) {
         buf.append('-').append((index).intValue());
       }
+      Integer emptyIndex = this.get(CoreAnnotations.EmptyIndexAnnotation.class);
+      if (emptyIndex != null && emptyIndex != 0) {
+        buf.append('.').append((emptyIndex).intValue());
+      }
       break;
     }
     case VALUE_TAG: {
@@ -779,6 +783,10 @@ public String toString(OutputFormat format) {
       if (index != null) {
         buf.append('-').append((index).intValue());
       }
+      Integer emptyIndex = this.get(CoreAnnotations.EmptyIndexAnnotation.class);
+      if (emptyIndex != null && emptyIndex != 0) {
+        buf.append('.').append((emptyIndex).intValue());
+      }
       break;
     }
     case VALUE_INDEX_MAP: {
@@ -787,6 +795,10 @@ public String toString(OutputFormat format) {
       if (index != null) {
         buf.append('-').append((index).intValue());
       }
+      Integer emptyIndex = this.get(CoreAnnotations.EmptyIndexAnnotation.class);
+      if (emptyIndex != null && emptyIndex != 0) {
+        buf.append('.').append((emptyIndex).intValue());
+      }
       Map<String,Object> map2 = new TreeMap<>();
       for (Class key : this.keySet()) {
         String cls = key.getName();
@@ -814,6 +826,10 @@ public String toString(OutputFormat format) {
       if (index != null) {
         buf.append('-').append((index).intValue());
       }
+      Integer emptyIndex = this.get(CoreAnnotations.EmptyIndexAnnotation.class);
+      if (emptyIndex != null && emptyIndex != 0) {
+        buf.append('.').append((emptyIndex).intValue());
+      }
       break;
     }
     case VALUE_TAG_NER:{
@@ -833,6 +849,10 @@ public String toString(OutputFormat format) {
       if (index != null) {
         buf.append('-').append((index).intValue());
       }
+      Integer emptyIndex = this.get(CoreAnnotations.EmptyIndexAnnotation.class);
+      if (emptyIndex != null && emptyIndex != 0) {
+        buf.append('.').append((emptyIndex).intValue());
+      }
       break;
     case ALL:{
       for (Class en: this.keySet()) {