Added CHANGELOG item and fixed Rubocop errors

CHANGELOG

@@ -40,6 +40,7 @@ v 8.9.0 (unreleased)
   - Links from a wiki page to other wiki pages should be rewritten as expected
   - Add option to project to only allow merge requests to be merged if the build succeeds (Rui Santos)
   - Fix issues filter when ordering by milestone
+  - Disable SAML account unlink feature
   - Added artifacts:when to .gitlab-ci.yml - this requires GitLab Runner 1.3
   - Bamboo Service: Fix missing credentials & URL handling when base URL contains a path (Benjamin Schmid)
   - TeamCity Service: Fix URL handling when base URL contains a path

spec/controllers/profiles/accounts_controller_spec.rb

@@ -21,8 +21,6 @@ describe Profiles::AccountsController do
   it 'does allow to delete other linked accounts' do
     user.identities.create(provider: 'twitter', extern_uid: 'twitter_123')
 
-    expect{
-      delete :unlink, provider: 'twitter'
-    }.to change(Identity.all, :size).by(-1)
+    expect { delete :unlink, provider: 'twitter' }.to change(Identity.all, :size).by(-1)
   end
 end