anchor.diff:  
   [source, sh]
   ----
  -user@val:~$ sudo sh -c 'cat > /etc/apache2/sites-available/ykval-ssl'
  +user@val:~$ sudo sh -c 'cat > /etc/apache2/sites-available/ykval-ssl.conf'
   Listen 443
   <VirtualHost *:443>
     ServerName api.example.com
  
positive.code: 
  [source, sh]
  ----
  user@val:~$ sudo sh -c 'cat > /etc/apache2/sites-available/ykval'
  <VirtualHost *:80>
    ServerName api.example.com
    ServerAdmin support@example.com
  
negative.code: 
  [source, sh]
  ----
  user@val:~$ sudo sh -c 'cat > /etc/apache2/sites-available/ykval-ssl.conf'
  <VirtualHost *:443>
    ServerName api.example.com
    ServerAdmin support@example.com
  