Use different class for try again button in collapsed diffs

app/assets/javascripts/notes.js

@@ -197,6 +197,8 @@ export default class Notes {
     );
 
     this.$wrapperEl.on('click', '.js-toggle-lazy-diff', this.loadLazyDiff);
+    this.$wrapperEl.on('click', '.js-toggle-lazy-diff-retry-button', this.loadLazyDiff);
+
     // fetch notes when tab becomes visible
     this.$wrapperEl.on('visibilitychange', this.visibilityChange);
     // when issue status changes, we need to refresh data
@@ -243,6 +245,7 @@ export default class Notes {
     this.$wrapperEl.off('click', '.js-comment-resolve-button');
     this.$wrapperEl.off('click', '.system-note-commit-list-toggler');
     this.$wrapperEl.off('click', '.js-toggle-lazy-diff');
+    this.$wrapperEl.off('click', '.js-toggle-lazy-diff-retry-button');
     this.$wrapperEl.off('ajax:success', '.js-main-target-form');
     this.$wrapperEl.off('ajax:success', '.js-discussion-note-form');
     this.$wrapperEl.off('ajax:complete', '.js-main-target-form');

app/views/discussions/_diff_with_notes.html.haml

@@ -31,7 +31,7 @@
             %td.line_content.js-success-lazy-load
               .js-code-placeholder
             %td.line_content.js-error-lazy-load-diff.hidden
-              - button = button_tag(_("Try again"), class: "btn-link btn-no-padding js-toggle-lazy-diff")
+              - button = button_tag(_("Try again"), class: "btn-link btn-no-padding js-toggle-lazy-diff-retry-button")
               = _("Unable to load the diff. %{button_try_again}").html_safe % { button_try_again: button}
           = render "discussions/diff_discussion", discussions: [discussion], expanded: true
   - else