message: docs: fix grammatical error
  'an' is replaced with 'a' for the adjective 'straightforward'
  resolves angular#45075
  PR Close
diff: @@ -11,7 +11,7 @@ the DOM as described by its template.
  The Angular `TestBed` facilitates this kind of testing as you'll see in the following sections.
  But in many cases, _testing the component class alone_, without DOM involvement,
  -can validate much of the component's behavior in an straightforward, more obvious way.
  +can validate much of the component's behavior in a straightforward, more obvious way.
  <div class="alert is-helpful">
  