message: docs: add " in architecture page
  after alert is helpful " is missing added it to the architecture page
  PR Close
diff: @@ -19,7 +19,7 @@ Both components and services are simply classes, with *decorators* that mark the
  An app's components typically define many views, arranged hierarchically. Angular provides the `Router` service to help you define navigation paths among views. The router provides sophisticated in-browser navigational capabilities.
  -<div class="alert is-helpful>
  +<div class="alert is-helpful">
  See the [Angular Glossary](guide/glossary) for basic definitions of important Angular terms and usage.
  