small fixes to doc and remove on whitespace noise

doc/ci/yaml/README.md

@@ -1433,7 +1433,7 @@ job1:
 ## `retry`
 
 > [Introduced][ce-12909] in GitLab 9.5.
-> [Behaviour expanded][ce-21758] in GitLab 11.4 to control on which failures to retry.
+> [Behaviour expanded][ce-21758] in GitLab 11.5 to control on which failures to retry.
 
 `retry` allows you to configure how many times a job is going to be retried in
 case of a failure.

lib/gitlab/ci/config/entry/job.rb

@@ -28,12 +28,10 @@ module Gitlab
               validates :allow_failure, boolean: true
               validates :parallel, numericality: { only_integer: true,
                                                    greater_than_or_equal_to: 2 }
-
               validates :when,
                 inclusion: { in: %w[on_success on_failure always manual delayed],
                              message: 'should be on_success, on_failure, ' \
                                       'always, manual or delayed' }
-
               validates :dependencies, array_of_strings: true
               validates :extends, type: String
             end