message: build(docs-infra): render CLI arguments consistently
  In the command syntax, arguments are rendered as
  `var`s enclosed in angle brackets. So this is now repeated
  in the arguments table too.
  PR Close
diff: <tbody>
  {% for option in arguments %}
  <tr class="cli-option">
  - <td><code>{$ option.name $}</code></td>
  + <td><code>&lt;<var>{$ option.name $}</var>&gt;</code></td>
  <td>
  {$ option.description | marked $}
  {% if option.subcommands.length -%}
  