Fix specs.

app/helpers/comments_helper.rb

@@ -42,4 +42,8 @@ module CommentsHelper
       false
     end
   end
+
+  def all_comments?
+    defined?(request_parameters) && !! params['all_comments']
+  end
 end

app/views/comments/_comments.html.haml

@@ -2,13 +2,13 @@
 -#   licensed under the Affero General Public License version 3 or later.  See
 -#   the COPYRIGHT file.
 .comment_stream
-  - unless comments_expanded || params['all_comments']
+  - unless comments_expanded || all_comments?
     %ul.show_comments{:class => ("hidden" if post.comments.size <= 3)}
       %li
         = comment_toggle( post)
 
   %ul.comments{:class => ('loaded' if post.comments.size <= 3)}
-    -if post.comments.size > 3 && !comments_expanded && ! params['all_comments']
+    -if post.comments.size > 3 && !comments_expanded && ! all_comments?
       = render :partial => 'comments/comment', :collection => post.comments.last(3), :locals => {:post => post}
     -else
       = render :partial => 'comments/comment', :collection => post.comments, :locals => {:post => post}