Change tools/editor/troubleshoot's anchors to use article/api-style anchors
Merge branch 'master' into issue-19457-editor-anchors

* master:
  Update spec reference; Fixes #910
  Add Adwords for video to Who Uses Dart
  Fix typos; Fixes #841
  Incorporating feedback. Also "hooking" the codelabs up to the menus make them more findable.
  Fix internal microtask links; Fixes #866
  Addresses main concern of #891, but not everything
  Fixes #895
  Fix rest of broken sample links; Fixes #903
  Fix broken link
  s/Januart/January Fixes #913
  Fixing an error that John found.
  Add quite to Who Uses Dart
  Adding a page, with some examples, about deferred loading.
  update Who Uses Dart
  fixes for bug number 20219
  Adding a[name]:target to also have padding top, for Dart Tour
  Fixing Issue 20687
  Adding a note that pub run is slow in 1.6.
s/a name/a id/
Merge pull request #958 from srawlins/issue-19457-editor-anchors

Change tools/editor/troubleshoot's anchors to use article/api-style anchors