link to docs from settings page

other minor review feedback

app/models/ee/project.rb

@@ -140,7 +140,7 @@ module EE
     end
 
     def can_override_approvers?
-      !disable_overriding_approvers_per_merge_request
+      !disable_overriding_approvers_per_merge_request?
     end
 
     def shared_runners_available?

app/views/projects/ee/_merge_request_settings.html.haml

@@ -113,6 +113,7 @@
       = form.label :disable_overriding_approvers_per_merge_request do
         = form.check_box(:disable_overriding_approvers_per_merge_request, { checked: can_override_approvers }, false, true)
         %strong Can overwrite approvers and approvals required per merge request
+        = link_to icon('question-circle'), help_page_path("user/project/merge_requests/merge_request_approvals", anchor: 'can-overwrite-approvers-and-approvals-required-per-merge-request'), target: '_blank'
 
   .form-group.reset-approvals-on-push
     .checkbox

doc/user/project/merge_requests/merge_request_approvals.md

@@ -24,11 +24,11 @@ The number of approvers can be higher than the required approvals.
 
 ### Can overwrite approvers and approvals required per merge request
 
-> [Introduced][https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/2016] in GitLab Enterprise Edition 9.4.
+> Introduced in GitLab Enterprise Edition 9.4.
 
 When this setting is enabled, the approvers for a project can be overridden for
 a merge request. When editing a merge request you can add or remove approvers,
-and change the number of required approvers.
+and increase the number of required approvers.
 
 ### Reset approvals on push