docs(ngModelController): remove bogus @param fields
docs(ngModelController): add $name property
docs(ngValue): clarify the limitations of ngValue and option elements
docs(input): replace dateTimeLocal by datetime-local

Fixes #9856
Closes #9870
docs($route): replace comma with "and"

Remove a comma and replace with "and" on line 444

Closes #9889
docs(guide/scope): describe watch depths

Describe and visualize the three watch strategies: By reference, by collection items, and by value.

Closes #9388
feat($anchorScroll): add support for scrolling independently of `$location.hash()`

Add an optional argument to `$anchorScroll()` to enable scrolling to an
anchor element different than that related to the current value of
`$location.hash()`. If the argument is omitted, the value of
`$location.hash()` will be used instead.

Closes #4568