课堂导出的提示信息调整

app/controllers/courses_controller.rb

@@ -1280,7 +1280,7 @@ class CoursesController < ApplicationController
     end
 
     if @all_members.size == 0
-      normal_status(-1,"课堂暂时没有学生")
+      normal_status(-1,"暂无学生数据")
     elsif params[:export].present? && params[:export]
       normal_status(0,"正在下载中")
     else
@@ -1308,7 +1308,7 @@ class CoursesController < ApplicationController
         end
 
         if @all_members.length == 0
-          normal_status(-1,"课堂暂时没有学生")
+          normal_status(-1,"暂无学生数据")
         elsif params[:export].present? && params[:export]
           normal_status(0,"正在下载中")
         else