新增：合并请求详情接口

app/views/api/v1/projects/pulls/show.json.jbuilder

@@ -0,0 +1,29 @@
+json.partial! "api/v1/projects/pulls/simple_detail", pull: @pull_request
+json.merge_base @result_object['merge_base']
+json.base_commit_sha @result_object['base']['sha']
+json.head_commit_sha @result_object['head']['sha']
+json.commit_num @result_object['commit_num']
+json.changed_files @result_object['changed_files']
+json.is_locked @result_object['is_locked']
+json.mergeable @result_object['mergeable'] # 是否能合并
+json.merged @result_object['merged']
+json.merged_at @result_object['merged_at'].nil? ? '' : render_unix_time( @result_object['merged_at']) 
+json.merge_commit_sha @result_object['merge_commit_sha']
+json.merge_by do 
+  if @result_object['merged_by']
+    json.partial! 'api/v1/users/commit_user', locals: { user: render_cache_commit_author(@result_object['merged_by']), name: @result_object['merged_by']['login'] }
+  else 
+    json.nil!
+  end
+end
+json.last_review do 
+  if @last_review.present? 
+    json.(@last_review, :id, :commit_id, :content, :status)
+    json.created_at format_time(@last_review.created_at)
+    json.reviewer do 
+      json.partial! "api/v1/users/simple_user", user: @last_review.reviewer
+    end
+  else 
+    json.nil! 
+  end
+end