docs(Angular): fix punctuation

Closes #10481
docs(Angular): improve sentence flow

Closes #10482
fix(filterFilter): let expression object `{$: '...'}` also match primitive items

Closes #10428
refactor(orderBy): remove unneeded function wrapping
perf(limitTo): replace for loop with slice
fix(filterFilter): make `$` match properties on deeper levels as well

Closes #10401
docs($httpBackend): correct grammar

Closes #10496
docs($animate): fix misleading $animate.cancel example

The given example is wrong, you can't cancel the promise returned by "then"
since it is not the one originally tracked by "addClass".

Closes #10498
feat(limitTo): ignore limit when undefined