修复修改密码时，错误信息在其他页面会提示的BUG

app/controllers/my_controller.rb

@@ -140,11 +140,11 @@ class MyController < ApplicationController
         @user.password, @user.password_confirmation = params[:new_password], params[:new_password_confirmation]
         
         if @user.save
-          flash[:notice] = l(:notice_account_password_updated)
+          flash.now[:notice] = l(:notice_account_password_updated)
           redirect_to my_account_path
         end
       else
-        flash[:error] = l(:notice_account_wrong_password)
+        flash.now[:error] = l(:notice_account_wrong_password)
       end
     end
   end