Change case "Add Approval" -> "Add approval"

doc/user/project/merge_requests/merge_request_approvals.md

@@ -81,8 +81,8 @@ the following is possible:
       ![Approve](img/approve.png)
 
   - If the required number of approvals has already been met, they can still
-    approve it by clicking the displayed **Add Approval** button.
-      ![Add Approval](img/approve_additionally.png)
+    approve it by clicking the displayed **Add approval** button.
+      ![Add approval](img/approve_additionally.png)
 
     ---
 

ee/app/assets/javascripts/vue_merge_request_widget/components/approvals/approvals_body.js

@@ -55,7 +55,7 @@ export default {
     approveButtonText() {
       let approveButtonText = s__('mrWidget|Approve');
       if (this.approvalsLeft <= 0) {
-        approveButtonText = s__('mrWidget|Add Approval');
+        approveButtonText = s__('mrWidget|Add approval');
       }
       return approveButtonText;
     },

ee/changelogs/unreleased/sh-rename-approve-additionally.yml

 ---
-title: Rename "Approve Additionally" to "Add Approval"
+title: Rename "Approve Additionally" to "Add approval"
 merge_request:
 author:
 type: other

ee/spec/features/projects/merge_requests/user_approves_merge_request_spec.rb

@@ -58,13 +58,13 @@ describe 'User approves a merge request', :js do
       wait_for_requests
 
       expect(page).not_to have_button('Approve')
-      expect(page).not_to have_button('Add Approval')
+      expect(page).not_to have_button('Add approval')
     end
 
     def sign_in_visit_merge_request(user, additional_approver = false)
       sign_in(user)
       visit(merge_request_path(merge_request))
-      button_text = additional_approver ? 'Add Approval' : 'Approve'
+      button_text = additional_approver ? 'Add approval' : 'Approve'
       click_button(button_text)
       wait_for_requests
       sign_out(user)

locale/gitlab.pot

@@ -4085,7 +4085,7 @@ msgstr ""
 msgid "mrWidget|Approve"
 msgstr ""
 
-msgid "mrWidget|Add Approval"
+msgid "mrWidget|Add approval"
 msgstr ""
 
 msgid "mrWidget|Approved by"

spec/javascripts/approvals/approvals_body_spec.js

@@ -115,13 +115,13 @@ import ApprovalsBody from 'ee/vue_merge_request_widget/components/approvals/appr
           });
         });
 
-        it('The approve button should have the "Add Approval" text', function (done) {
+        it('The approve button should have the "Add approval" text', function (done) {
           this.approvalsBody.approvalsLeft = 0;
           this.approvalsBody.userHasApproved = false;
           this.approvalsBody.userCanApprove = true;
 
           Vue.nextTick(() => {
-            expect(this.approvalsBody.approveButtonText).toBe('Add Approval');
+            expect(this.approvalsBody.approveButtonText).toBe('Add approval');
             done();
           });
         });