rechange 1936 scores

db/migrate/20190823090957_rechange_exercise_1936_scores.rb

@@ -1,4 +1,4 @@
-class ChangeExericse1936Scores < ActiveRecord::Migration[5.2]
+class RechangeExercise1936Scores < ActiveRecord::Migration[5.2]
   include ExercisesHelper
   def change
     #1936的试卷成绩有问题。