Remove legacy special case for emphasized reference notes

app/services/system_note_service.rb

@@ -196,7 +196,7 @@ class SystemNoteService
     end
 
     gfm_reference = mentioner_gfm_ref(noteable, mentioner, true)
-    notes = notes.where('note like ?', cross_reference_note_pattern(gfm_reference))
+    notes = notes.where(note: cross_reference_note_content(gfm_reference))
 
     notes.count > 0
   end
@@ -207,17 +207,14 @@ class SystemNoteService
     Note.create(args.merge(system: true))
   end
 
-  def self.cross_reference_note_prefix
-    'mentioned in '
-  end
-
   # Prepend the mentioner's namespaced project path to the GFM reference for
   # cross-project references.  For same-project references, return the
   # unmodified GFM reference.
   def self.mentioner_gfm_ref(noteable, mentioner, cross_reference = false)
-    if mentioner.is_a?(Commit) && cross_reference
-      return mentioner.gfm_reference.sub('commit ', 'commit %')
-    end
+    # FIXME (rspeicher): This was breaking things.
+    # if mentioner.is_a?(Commit) && cross_reference
+    #   return mentioner.gfm_reference.sub('commit ', 'commit %')
+    # end
 
     full_gfm_reference(mentioner.project, noteable.project, mentioner)
   end
@@ -243,13 +240,12 @@ class SystemNoteService
     end
   end
 
-  def self.cross_reference_note_content(gfm_reference)
-    cross_reference_note_prefix + "#{gfm_reference}"
+  def self.cross_reference_note_prefix
+    'mentioned in '
   end
 
-  def self.cross_reference_note_pattern(gfm_reference)
-    # Older cross reference notes contained underscores for emphasis
-    "%" + cross_reference_note_content(gfm_reference) + "%"
+  def self.cross_reference_note_content(gfm_reference)
+    "#{cross_reference_note_prefix}#{gfm_reference}"
   end
 
   # Build an Array of lines detailing each commit added in a merge request

spec/services/system_note_service_spec.rb

@@ -313,41 +313,5 @@ describe SystemNoteService do
           to be_falsey
       end
     end
-
-    context 'legacy note with Markdown emphasis' do
-      let(:mentioner) { create(:issue, project: project) }
-
-      before do
-        note = "_mentioned in issue ##{mentioner.iid}_"
-        create(:system_note, noteable: noteable, note: note, project: project)
-      end
-
-      it 'detects if a mentionable with emphasis has been mentioned' do
-        expect(described_class.cross_reference_exists?(noteable, mentioner)).
-          to be_truthy
-      end
-
-      context 'when referenced project has underscores' do
-        let(:project)  { create(:empty_project, path: 'first_project') }
-        let(:project2) { create(:empty_project, path: 'second_project') }
-
-        let(:issue)  { mentioner }
-        let(:issue2) { create(:issue, project: project2) }
-
-        before do
-          described_class.cross_reference(issue, issue2, author)
-        end
-
-        it 'is truthy when already mentioned' do
-          expect(described_class.cross_reference_exists?(issue, issue2)).
-            to be_truthy
-        end
-
-        it 'is falsey when not already mentioned' do
-          expect(described_class.cross_reference_exists?(issue2, issue)).
-            to be_falsey
-        end
-      end
-    end
   end
 end