新增：合并请求详情新增关联疑修返回

app/views/pull_requests/show.json.jbuilder

@@ -51,4 +51,8 @@ json.issue do
   json.issue_tags @issue.get_issue_tags
 end
 
+json.attached_issues @pull_request.attached_issues.each do |issue|
+  json.(issue, :id,:subject)
+end
+
 json.conflict_files @pull_request.conflict_files