Link to the tag in system note

app/services/system_note_service.rb

@@ -42,7 +42,8 @@ module SystemNoteService
   #
   # Returns the created Note object
   def tag_commit(noteable, project, author, tag_name)
-    body = "tagged commit #{noteable.sha} to `#{tag_name}`"
+    link = url_helpers.project_tag_url(project, id: tag_name)
+    body = "tagged commit #{noteable.sha} to [`#{tag_name}`](#{link})"
 
     create_note(NoteSummary.new(noteable, project, author, body, action: 'tag'))
   end

spec/services/system_note_service_spec.rb

@@ -114,7 +114,7 @@ describe SystemNoteService do
     let(:noteable) do
       project.commit
     end
-    let(:tag_name) { '1.2.3' }
+    let(:tag_name) { 'v1.2.3' }
 
     subject { described_class.tag_commit(noteable, project, author, tag_name) }
 
@@ -123,7 +123,9 @@ describe SystemNoteService do
     end
 
     it 'sets the note text' do
-      expect(subject.note).to eq "tagged commit #{noteable.sha} to `#{tag_name}`"
+      link = "http://localhost/#{project.full_path}/tags/#{tag_name}"
+
+      expect(subject.note).to eq "tagged commit #{noteable.sha} to [`#{tag_name}`](#{link})"
     end
   end