anchor.diff:  
   [source,sh]
   --------------------------------------------------
  -sudo yum install elasticsearch <1>
  -sudo dnf install elasticsearch <2>
  -sudo zypper install elasticsearch <3>
  +sudo yum install --enablerepo=elasticsearch elasticsearch <1>
  +sudo dnf install --enablerepo=elasticsearch elasticsearch <2>
  +sudo zypper modifyrepo --enable elasticsearch && \
  +  sudo zypper install elasticsearch; \
  +  sudo zypper modifyrepo --disable elasticsearch <3>
   --------------------------------------------------
   <1> Use `yum` on CentOS and older Red Hat based distributions.
   <2> Use `dnf` on Fedora and other newer Red Hat distributions.
   <3> Use `zypper` on OpenSUSE based distributions
  +
  +[NOTE]
  +==================================================
  +
  +The configured repository is disabled by default. This eliminates the possibility of accidentally
  +upgrading `elasticsearch` when upgrading the rest of the system. Each install or upgrade command
  +must explicitly enable the repository as indicated in the sample commands above.
   
   endif::[]
   
  
positive.code: 
  ["source","sh",subs="attributes,callouts"]
  --------------------------------------------------
  [elasticsearch-{major-version}]
  name=Elasticsearch repository for {major-version} packages
  baseurl=https://artifacts.elastic.co/packages/{major-version}-prerelease/yum
  gpgcheck=1
  gpgkey=https://artifacts.elastic.co/GPG-KEY-elasticsearch
  enabled=1
  autorefresh=1
  type=rpm-md
  --------------------------------------------------
  
negative.code: 
  ["source","sh",subs="attributes,callouts"]
  --------------------------------------------------
  [elasticsearch]
  name=Elasticsearch repository for {major-version} packages
  baseurl=https://artifacts.elastic.co/packages/{major-version}/yum
  gpgcheck=1
  gpgkey=https://artifacts.elastic.co/GPG-KEY-elasticsearch
  enabled=0
  autorefresh=1
  type=rpm-md
  --------------------------------------------------
  