Fix Dashboard Pagination Helper typo (#541)

Resolves issue when displaying the dashboard caused by missing
parenthesis is in code for the pagination helper.

After this change the dashboard displays as expected.

Author: cattekin

lib/split/dashboard/pagination_helpers.rb

@@ -25,7 +25,7 @@ def pagination(collection)
       html << current_page_tag
       html << next_page_tag if show_next_page_tag?(collection)
       html << ellipsis_tag if show_last_ellipsis_tag?(collection)
-      html << last_page_tagcollection if show_last_page_tag?(collection)
+      html << last_page_tag(collection) if show_last_page_tag?(collection)
       html.join
     end