message: build(docs-infra): pluralize NgModule(s) heading as appropriate
  PR Close
diff: -<h2>NgModules</h2>
  +{% if doc.ngModules.length == 1 %}<h2>NgModule</h2>{% else %}<h2>NgModules</h2>{% endif %}
  <ul class="ngmodule-list">
  {% for ngModule in doc.ngModules %}
  <li>
  