anchor.diff:  <div class="row" id="content-types">
     <div class="col-sm-3">
       <div class="card">
  -      <h1 class="card-heading">Characters</h3>
  +      <h1 class="card-heading">Characters</h1>
         <%= image_tag "card-headers/characters.jpg" %>
         <div class="card-body">
           <p>
  
positive.code: 
    <div class="col-sm-3">
      <div class="card">
        <h1 class="card-heading simple">Universes</h3>
        <%= image_tag "card-headers/universes.jpg" %>
        <div class="card-body">
          <p>
  
negative.code: 
    <div class="col-sm-3">
      <div class="card">
        <h1 class="card-heading">Equipment</h1>
        <%= image_tag "card-headers/equipment.jpg" %>
        <div class="card-body">
          <p>
  