Start getting acceptance tests for retry working

There's a puzzle here with the output on the second scenario, with two
retries. I've detailed what I think the summary should be, but there
seems to be a passing scenario missing from the results totals.

Did I make a mistake, or is the code still wrong?

features/docs/cli/retry_failing_tests.feature

@@ -1,32 +1,52 @@
-@wip
 Feature: Retry failing tests
 
   Retry gives you a way to get through flaky tests that usually pass after a few runs.
   This gives a development team a way forward other than disabling a valuable test.
-  
+
   - Specify max retry count in option
   - Output information to the screen
   - Output retry information in test report
-  
+
   Questions:
   use a tag for flaky tests?  Global option to retry any test that fails?
-  
+
   Background:
     Given a scenario "Flakey" that fails once, then passes
     And a scenario "Shakey" that fails twice, then passes
     And a scenario "Solid" that passes
     And a scenario "No Dice" that fails
-
-  Scenario:
+
+  @wip
+  Scenario: Retry once, so Flakey starts to pass
     When I run `cucumber -q --retry 1`
     Then it should fail with:
       """
-      4 scenarios (2 passed, 2 failed)
+      7 scenarios (5 failed, 2 passed)
       """
 
-  Scenario:
+  @wip
+  Scenario: Retry twice, so Shakey starts to pass too
+
+    First try:
+    Flacey x
+    Shakey x
+    Solid ✔︎
+    No Dice x
+    => 4 scenarios (1 passed, 3 failed)
+
+    First retry:
+    Flakey ✔︎
+    Shakey x
+    No Dice x
+    => 7 scenarios (2 passed, 5 failed)
+
+    Second retry:
+    Shakey ✔︎
+    No Dice x
+    => 9 scenarios (3 passed, 6 failed)
+
     When I run `cucumber -q --retry 2`
-    Then it should pass with:
+    Then it should fail with:
+      """
+      9 scenarios (6 failed, 3 passed)
       """
-      4 scenarios (3 passed, 1 failed)
-      """

lib/cucumber/filters.rb

@@ -6,4 +6,5 @@
 require 'cucumber/filters/prepare_world'
 require 'cucumber/filters/quit'
 require 'cucumber/filters/randomizer'
+require 'cucumber/filters/retry'
 require 'cucumber/filters/tag_limits'

lib/cucumber/runtime.rb

@@ -227,6 +227,7 @@ def filters
         filters << Cucumber::Core::Test::LocationsFilter.new(filespecs.locations)
         filters << Filters::Randomizer.new(@configuration.seed) if @configuration.randomize?
         filters << Filters::Quit.new
+        filters << Filters::Retry.new(@configuration)
         # TODO: can we just use RbLanguages's step definitions directly?
         step_match_search = StepMatchSearch.new(@support_code.ruby.method(:step_matches), @configuration)
         filters << Filters::ActivateSteps.new(step_match_search, @configuration)