* docs(router): fix markdown and example mixin cleanup
- Fixed: markdown text not under `:marked` region (and so that text was
not showing up in the generated html).
- Fixed: code excerpt title `constructor` -> `isSelected`.
- Cleanup of all makeExample mixin uses.
This cleanup will help make it easier to record differences with the
deprecated router chapter (which must have app-relative makeExample
paths).
* post-review updates
Found another instance of markdown (a heading) outside of a `:marked` region.
ea457825b8