docs(guide/forms): correct grammar
docs(CHANGELOG.md): fix typos for ng-switch-changed workaround

Fix the JavaScript errors in the work-around proposed in 0f806d9 in order to emulate the behaviour
of the removed `change` attribute of ngSwitch.

Closes #9034
refactor(ngEventDirs): remove a useless call

The event names are already lower-case.
perf($parse): removing binaryFn and valueFn wrappers from filter expressions

Improves parsed-expressions/filters benchmark by 15%.
refactor($parse): clean up object literal fn

No measurable impact on performance
refactor($parse): remove commented out code
fix($parse): ensure CSP assignable expressions have `assign()`

Fixes regression where the `assign()` method was not added to chains of identifiers in CSP mode,
introduced originally in b3b476d.

Also fixes the $parse test suite to ensure that CSP code paths are taken when they're expected to be
taken.

Closes #9048
chore(docs): update to dgeni-0.4.0

* update package with new services and computeId config
* generateIndexPagesProcessor was not using log
* use StringMap not ES6-shim Map in errorNamespaceMap
* remove unused dependencies from generateErrorDocsProcessor
* ensure generatePagesDataProcessor adds its doc to the collection
* debugDumpProcessor was moved to dgeni-packages
test(docs): improve docs e2e tests
test(docs): add extra docs e2e tests
fix(jqLite): fix event.stopImmediatePropagation() so it works as expected

jqLite doesn't override the default implementation of event.stopImmediatePropagation()
and so it doesn't work as expected, i.e, it doesn't prevent the rest of the event
handlers from being executed.

Closes #4833
test(jqLite): Refactor test for isDefaultPrevent

Refactor the spec for isDefaultPrevent method so it fails if the
existing expectations aren't executed.