fixed tab being clicked throwing an error

app/assets/javascripts/ide/components/repo_tab.vue

@@ -45,7 +45,7 @@ export default {
       this.updateDelayViewerUpdated(true);
 
       if (tab.pending) {
-        this.openPendingTab(tab);
+        this.openPendingTab({ file: tab, keyPrefix: tab.staged ? 'staged' : 'unstaged' });
       } else {
         this.$router.push(`/project${tab.url}`);
       }