- Remove statement that doesn't apply: "We recommend registering
app-wide services in the root
`AppModule` *providers*" - but that isn't being done.
- Adding parentheses after method names; a few were missed in the
previous pass.
- `debounce()` --> `debounceTime()`
- Remove obsolete Dart prose.
- Fix heading indentation.
- Added missing closing `</span>`.
- Fix misnamed Jade variables.
cc @kapunahelewong
e9a6001d60