Improve grammar

app/views/projects/merge_requests/show/_mr_title.html.haml

 - if @merge_request.closed_without_fork?
   .alert.alert-danger
-    %p Source project is not a fork of the target project
+    %p The source project of this merge request has been removed.
 
 .clearfix.detail-page-header
   .issuable-header

app/views/shared/issuable/_form.html.haml

@@ -134,7 +134,7 @@
       title: 'Moving an issue will copy the discussion to a different project and close it here. All participants will be notified of the new location.' }
         = icon('question-circle')
 
-- if issuable.is_a?(MergeRequest) && !@merge_request.closed_without_fork?
+- if issuable.is_a?(MergeRequest) && !issuable.closed_without_fork?
   %hr
   - if @merge_request.new_record?
     .form-group

spec/controllers/projects/merge_requests_controller_spec.rb

@@ -171,7 +171,7 @@ describe Projects::MergeRequestsController do
         expect(merge_request.reload.closed?).to be_truthy
       end
 
-      it 'allow to edit closed MR' do
+      it 'allows editing of a closed merge request' do
         merge_request.close!
 
         put :update,
@@ -186,7 +186,7 @@ describe Projects::MergeRequestsController do
         expect(merge_request.reload.title).to eq 'New title'
       end
 
-      it 'does not allow to update target branch closed MR' do
+      it 'does not allow to update target branch closed merge request' do
         merge_request.close!
 
         put :update,

spec/models/merge_request_spec.rb

@@ -969,7 +969,7 @@ describe MergeRequest, models: true do
     let(:user)         { create(:user) }
     let(:unlink_project) { Projects::UnlinkForkService.new(fork_project, user) }
 
-    context "when fork exists" do
+    context "when the fork exists" do
       let(:merge_request) do
         create(:merge_request,
           source_project: fork_project,
@@ -979,13 +979,13 @@ describe MergeRequest, models: true do
       it { expect(merge_request.fork_missing?).to be_falsey }
     end
 
-    context "when source project is the target project" do
+    context "when the source project is the same as the target project" do
       let(:merge_request) { create(:merge_request, source_project: project) }
 
       it { expect(merge_request.fork_missing?).to be_falsey }
     end
 
-    context "when fork does not exist" do
+    context "when the fork does not exist" do
       let(:merge_request) do
         create(:merge_request,
           source_project: fork_project,
@@ -1007,18 +1007,18 @@ describe MergeRequest, models: true do
     let(:user)         { create(:user) }
     let(:unlink_project) { Projects::UnlinkForkService.new(fork_project, user) }
 
-    context "when merge request is closed" do
+    context "when the merge request is closed" do
       let(:closed_merge_request) do
         create(:closed_merge_request,
           source_project: fork_project,
           target_project: project)
       end
 
-      it "returns false if fork exist" do
+      it "returns false if the fork exist" do
         expect(closed_merge_request.closed_without_fork?).to be_falsey
       end
 
-      it "returns true if fork doesn't exist" do
+      it "returns true if the fork does not exist" do
         unlink_project.execute
         closed_merge_request.reload
 
@@ -1026,7 +1026,7 @@ describe MergeRequest, models: true do
       end
     end
 
-    context "when merge request is open" do
+    context "when the merge request is open" do
       let(:open_merge_request) do
         create(:merge_request,
           source_project: fork_project,

spec/views/projects/merge_requests/edit.html.haml_spec.rb

@@ -24,7 +24,7 @@ describe 'projects/merge_requests/edit.html.haml' do
       .and_return(User.find(closed_merge_request.author_id))
   end
 
-  context 'when closed merge request without fork' do
+  context 'when a merge request without fork' do
     it "shows editable fields" do
       unlink_project.execute
       closed_merge_request.reload
@@ -39,7 +39,7 @@ describe 'projects/merge_requests/edit.html.haml' do
     end
   end
 
-  context 'when closed merge request with fork' do
+  context 'when a merge request with an existing source project is closed' do
     it "shows editable fields" do
       render
 

spec/views/projects/merge_requests/show.html.haml_spec.rb

@@ -22,16 +22,17 @@ describe 'projects/merge_requests/show.html.haml' do
     allow(view).to receive(:can?).and_return(true)
   end
 
-  context 'when merge request is closed' do
-    it 'shows Reopen button' do
+  context 'when the merge request is closed' do
+    it 'shows the "Reopen" button' do
       render
 
       expect(rendered).to have_css('a', visible: true, text: 'Reopen')
       expect(rendered).to have_css('a', visible: false, text: 'Close')
     end
 
-    it 'does not show Reopen button without fork' do
+    it 'does not show the "Reopen" button when the source project does not exist' do
       fork_project.destroy
+
       render
 
       expect(rendered).to have_css('a', visible: false, text: 'Reopen')