Added compute property to diff file + changed a for loop

app/assets/javascripts/diffs/components/diff_file.vue

@@ -46,6 +46,9 @@ export default {
     showExpandMessage() {
       return this.isCollapsed && !this.isLoadingCollapsedDiff && !this.file.tooLarge;
     },
+    showLoadingIcon() {
+      return this.isLoadingCollapsedDiff || (!this.file.renderIt && !this.isCollapsed);
+    },
   },
   methods: {
     ...mapActions('diffs', ['loadCollapsedDiff']),
@@ -133,7 +136,7 @@ export default {
       :diff-file="file"
     />
     <loading-icon
-      v-if="isLoadingCollapsedDiff || (!file.renderIt && !isCollapsed)"
+      v-else-if="showLoadingIcon"
       class="diff-content loading"
     />
     <div

app/assets/javascripts/diffs/store/mutations.js

@@ -34,7 +34,7 @@ export default {
       if (file.highlightedDiffLines) {
         const linesLength = file.highlightedDiffLines.length;
-        let u = 0;
+        let u;
         for (u = 0; u < linesLength; u += 1) {
           const line = file.highlightedDiffLines[u];
           delete line.text;