Fix have_issuable_counts matcher on failure

spec/support/matchers/have_issuable_counts.rb

 RSpec::Matchers.define :have_issuable_counts do |opts|
-  match do |actual|
   expected_counts = opts.map do |state, count|
     "#{state.to_s.humanize} #{count}"
   end
 
+  match do |actual|
     actual.within '.issues-state-filters' do
       expected_counts.each do |expected_count|
         expect(actual).to have_content(expected_count)