anchor.diff:            <span class='command-response'>*  For example, the following code took >2.5 h to run on PC SAS;</span>
             <span class='command-response'>*    over a home internet connection;</span>
             <span class='command-prompt'>proc copy</span>
  -          <span class='command-prompt'>   in = </span><span>cloud</span>
  -          <span class='command-prompt'>   out = </span><span>sasdata</span>
  +          <span class='command-prompt'>   in = </span><span class='command-entry'>cloud</span>
  +          <span class='command-prompt'>   out = </span><span class='command-entry'>sasdata</span>
             <span class='command-prompt'>   ;</span>
             <span class='command-entry'>   select studies  sponsors ; </span><span class='command-response'> /* select a subset of database tables */</span>
             <span class='command-prompt'>   run;</span>
  
positive.code:     <p class='CodeRay'>
        <pre>
          <p class='code'>
            <span class='command-prompt'>proc contents data=</span><span>cloud._all_;</span>
            <span class='command-prompt'>run;</span>
          </p>
        </pre>
  
negative.code:     <p class='CodeRay'>
        <pre>
          <p class='code'>
            <span class='command-entry'>proc sql;</span>
            <span class='command-prompt'>   connect to postgres as aact (</span>
            <% if user_signed_in? %>
            <span class='command-prompt'>      user=</span><span class='command-entry'>"<%= current_user.username %>"</span>
            <% else %>
            <span class='command-prompt'>      user=</span><span class='command-note'>(sign up/in to get a username)</span>
            <% end %>
            <span class='command-prompt'>      database=</span><span class='command-entry'>"<%= ENV["DB_READONLY_DBNAME"] %>"</span>
            <span class='command-prompt'>      server=</span><span class='command-entry'>"<%= ENV["DB_HOSTNAME"] %>"</span>
            <span class='command-prompt'>      port=</span><span class='command-entry'>5432</span>
            <span class='command-prompt'>      );</span>
            <span class='command-prompt'>   title 'Number of studies'; </span>
            <span class='command-entry'>      select count(*) from connection to aact </span>
  