anchor.diff:    <div class="popular-courses">
       <div class="card">
         <div class="image">
  -        <img src="<%= image_path('05.jpeg')%>">
  +        <img src="<%= image_path('05.jpg')%>">
         </div>
         <div class="content">
           <span class="title">英倫搖滾概論與教學</span>
  
positive.code: 
      <div class="card">
        <div class="image">
          <img src="<%= image_path('Dapper.jpeg')%>">
        </div>
        <div class="content">
          <span class="title">管理, 是一種生活態度</span>
  
negative.code: 
      <div class="card">
        <div class="image">
          <img src="<%= image_path('Wanderlust.jpg')%>">
        </div>
        <div class="content">
          <span class="title">英倫風穿搭訣竅分享</span>
  