Show comments with hidden authors

In the past, whenever we hid users, we also hid their comments.
However, we've now implemented an action to hide users without hiding
their comments. In this case, we still want to show the comment, but we
weren't doing so.

app/views/comments/_comment.html.erb

@@ -2,7 +2,7 @@
 <% cache [locale_and_user_status(comment), comment, commentable_cache_key(comment.commentable), comment.author] do %>
   <div id="<%= dom_id(comment) %>" class="comment small-12">
     <div class="comment-body">
-      <% if comment.hidden? || comment.user.hidden? %>
+      <% if comment.hidden? %>
         <% if comment.children.size > 0 %>
           <div class="callout secondary">
             <p><%= t("comments.comment.deleted") %></p>

spec/system/comments/debates_spec.rb

@@ -371,6 +371,16 @@ describe "Commenting debates" do
     end
   end
 
+  scenario "Show comment when the author is hidden" do
+    create(:comment, body: "This is pointless", commentable: debate, author: create(:user, :hidden))
+
+    visit debate_path(debate)
+
+    within ".comment", text: "This is pointless" do
+      expect(page).to have_content "User deleted"
+    end
+  end
+
   scenario "Errors on reply" do
     comment = create(:comment, commentable: debate, user: user)