According to sec-identifiers-static-semantics-assignmenttargettype,
`AssignmentTargetType` of `arguments` and `eval` in non-strict mode code is
`simple`.
sec-update-expressions-static-semantics-early-errors mandates early errors for
`UpdateExpression` if `AssignmentTargetType` is `invalid` or `strict`.

Add test for case of -kn-true
Verify no -kn-true nor -kn-false in the returned locale.
Change expectation per https://github.com/tc39/ecma402/pull/302

See https://tc39.github.io/proposal-intl-locale/#sec-canonicalizelocalelist

This is due to the fact we now only accept Unicode Locale Identifier in
UTS 35.

Previously, the early error prohibiting duplicate entries in
UniqueFormalParameters was only tested in terms of async functions. In
one case, this was misattributed to UniqeFormalParameters and only
enforced for strict mode code.

Extend coverage to the other function-creating productions which include
UniqueFormalParameters (i.e. method definitions and non-async arrow
functions), and update the existing tests to more accurately describe
the source of the error.

https://github.com/tc39/test262/pull/2020#issuecomment-456581449

Add missing features to private elements tests

 Update rs-private-getter-alt.case

Move proposals that have been incorporated into the standard to the
corresponding section.

Import test changes from V8

Merge pull request #2016 from test262-automation/javascriptcore-test262-automation-export-8f629cd87f

Import test changes from JavaScriptCore

Sync with https://github.com/tc39/proposal-intl-list-format/pull/36

Update same-line-async-gen-private-field-usage.js

Refactor, reorganize, and extend tests for line terminators

Previous commits restructured the tests for line terminators and made
coverage gaps more apparent. Introduce new files to improve coverage.

The tests for the parsing of line terminators were expressed using eval.
This made the tests more complex than necessary and also prevented the
tests from providing value to ECMAScript parsers.

Remove the use of eval and instead express the expectations with literal
source text. Rename the files to make each test's purpose more clear.

The tests for the parsing of line terminators were expressed using eval.
This made the tests more complex than necessary and also prevented the
tests from providing value to ECMAScript parsers.

Remove the use of eval and instead express the expectations with literal
source text. Rename the files to make each test's purpose more clear.

The tests for the parsing of line terminators were expressed using eval.
This made the tests more complex than necessary and also prevented the
tests from providing value to ECMAScript parsers.

Remove the use of eval and instead express the expectations with literal
source text. Rename the files to make each test's purpose more clear.

The tests for the parsing of line terminators were expressed using eval.
This made the tests more complex than necessary and also prevented the
tests from providing value to ECMAScript parsers.

Remove the use of eval and instead express the expectations with literal
source text.

The tests for the parsing of line terminators were expressed using eval.
This made the tests more complex than necessary and also prevented the
tests from providing value to ECMAScript parsers.

Remove the use of eval and instead express the expectations with literal
source text.

The behavior asserted by the removed tests is covered by other files.

- test/language/line-terminators/7.3-1.js duplicates
  test/language/line-terminators/S7.3_A1.3.js
- test/language/line-terminators/7.3-2.js duplicates
  test/language/line-terminators/S7.3_A1.4.js
- test/language/line-terminators/7.3-3.js duplicates
  test/language/line-terminators/S7.3_A3.3_T1.js
- test/language/line-terminators/7.3-4.js duplicates
  test/language/line-terminators/S7.3_A3.4_T1.js
- test/language/line-terminators/7.3-9.js duplicates
  test/language/line-terminators/S7.3_A6_T3.js
- test/language/line-terminators/7.3-10.js  duplicates
  test/language/line-terminators/S7.3_A6_T4.js
- test/language/line-terminators/S7.3_A1.1_T1.js duplicates
  test/language/line-terminators/S7.3_A1.1_T2.js
- test/language/line-terminators/S7.3_A1.2_T1.js duplicates
  test/language/line-terminators/S7.3_A1.2_T2.js
- test/language/line-terminators/S7.3_A3.1_T2.js duplicates
  test/language/line-terminators/S7.3_A3.1_T3.js
- test/language/line-terminators/S7.3_A3.2_T3.js duplicates
  test/language/line-terminators/S7.3_A3.2_T1.js
- test/language/line-terminators/S7.3_A3.3_T2.js duplicates
  test/language/line-terminators/S7.3_A3.3_T1.js
- test/language/line-terminators/S7.3_A3.4_T2.js duplicates
  test/language/line-terminators/S7.3_A3.4_T1.js
- test/language/line-terminators/S7.3_A4_T1.js duplicates
  test/language/line-terminators/S7.3_A3.1_T1.js
- test/language/line-terminators/S7.3_A5.1_T1.js duplicates
  test/language/line-terminators/S7.3_A5.1_T2.js
- test/language/line-terminators/S7.3_A5.2_T1.js duplicates
  test/language/line-terminators/S7.3_A5.2_T2.js

These files were authored to test the effect of the carriage return
character, but that character was not present in the source text.

Insert the character as intended by the authors.