Only create history entries for revisions with text or ring changes

static-pages/index.pug

@@ -10,7 +10,6 @@ block content
         h4= translate(quadrantName)
         ul
           each radarItem, itemName in quadrant
-            if radarItem.attributes.isFeatured === true
             li
               a(href='/' + quadrantName + '/' + itemName + '.html')
                 = radarItem.attributes.title

tasks/radar.js

@@ -91,17 +91,30 @@ const addRevisionToItem = (item = {
     fileName,
     ...rest,
   } = revision;
-  return {
+  let newItem = {
     ...item,
     attributes: {
       ...item.attributes,
       ...revision.attributes,
     },
+  };
+
+  if (revisionCreatesNewHistoryEntry(revision)) {
+    newItem = {
+      ...newItem,
       revisions: [
         rest,
-      ...item.revisions,
+        ...newItem.revisions,
       ],
+    }
+  }
+
+  return newItem;
 };
+
+const revisionCreatesNewHistoryEntry = (revision) => {
+  return revision.body.trim() !== '' ||
+         typeof revision.attributes.ring !== 'undefined';
 };
 
 export const outputRadar = (radar) => {

templates/item.pug

@@ -24,5 +24,8 @@ block content
     each revision, index in item.revisions
       if index > 0
         li
+          h3
             = revision.version
+            = ' '
+            = revision.attributes.ring
           != revision.body