Fix markdown layout of incident issues

app/services/incident_management/create_issue_service.rb

@@ -58,7 +58,7 @@ module IncidentManagement
     end
 
     def issue_description
-      horizontal_line = "\n---\n\n"
+      horizontal_line = "\n\n---\n\n"
 
       [
         alert_summary,

changelogs/unreleased/pl-incident-issue-hline.yml

+---
+title: Fix markdown layout of incident issues
+merge_request: 25352
+author:
+type: fixed

spec/services/incident_management/create_issue_service_spec.rb

@@ -4,7 +4,7 @@ require 'spec_helper'
 
 describe IncidentManagement::CreateIssueService do
   let(:project) { create(:project, :repository, :private) }
-  let(:user) { User.alert_bot }
+  let_it_be(:user) { User.alert_bot }
   let(:service) { described_class.new(project, alert_payload) }
   let(:alert_starts_at) { Time.now }
   let(:alert_title) { 'TITLE' }
@@ -29,7 +29,6 @@ describe IncidentManagement::CreateIssueService do
 
   context 'when create_issue enabled' do
     let(:issue) { subject[:issue] }
-    let(:summary_separator) { "\n---\n\n" }
 
     before do
       setting.update!(create_issue: true)
@@ -42,7 +41,7 @@ describe IncidentManagement::CreateIssueService do
         expect(issue.author).to eq(user)
         expect(issue.title).to eq(alert_title)
         expect(issue.description).to include(alert_presenter.issue_summary_markdown.strip)
-        expect(separator_count(issue.description)).to eq 0
+        expect(separator_count(issue.description)).to eq(0)
       end
     end
 
@@ -74,7 +73,7 @@ describe IncidentManagement::CreateIssueService do
           expect(subject).to include(status: :success)
 
           expect(issue.description).to include(alert_presenter.issue_summary_markdown)
-          expect(separator_count(issue.description)).to eq 1
+          expect(separator_count(issue.description)).to eq(1)
           expect(issue.description).to include(template_content)
         end
       end
@@ -134,7 +133,7 @@ describe IncidentManagement::CreateIssueService do
           expect(issue.description).to include(alert_presenter.issue_summary_markdown)
           expect(issue.description).to include(template_content)
           expect(issue.description).to include(alt_template)
-          expect(separator_count(issue.description)).to eq 2
+          expect(separator_count(issue.description)).to eq(2)
         end
       end
 
@@ -171,7 +170,7 @@ describe IncidentManagement::CreateIssueService do
         expect(issue.title).to include(query_title)
         expect(issue.title).to include('for 5 minutes')
         expect(issue.description).to include(alert_presenter.issue_summary_markdown.strip)
-        expect(separator_count(issue.description)).to eq 0
+        expect(separator_count(issue.description)).to eq(0)
       end
     end
 
@@ -306,6 +305,8 @@ describe IncidentManagement::CreateIssueService do
   end
 
   def separator_count(text)
+    summary_separator = "\n\n---\n\n"
+
     text.scan(summary_separator).size
   end
 end