Re-enable test now that the notification has expired

Author: shepmaster

tests/spec/features/highlighting_mir_output_spec.rb

@@ -12,8 +12,6 @@
   end
 
   scenario "error locations are links" do
-    pending "Double notifications block the text to click on"
-
     within(:output, :mir) do
       click_link('src/main.rs:4:14: 4:19', match: :first)
     end