* Fix#19959 and #19958: Remove un-localizable messages
* Update message
* Reorder error messages
* Fix https://github.com/Microsoft/TypeScript/issues/15399: remove periods at the end of messages
* Accept baselines for error code changes
* accept baselines for removed periods
* Update diagnostic messages
* Don't count a write-only reference as a use
* Split isWriteAccess to isWriteOnlyAccess and isReadOnlyAccess
* Update "unusedParameterUsedInTypeOf" to use "b"
* Update diagnostic messages: "is never used" -> "its value is never read"
* Use a WriteKind enum
* Rename enum and move documentation to enum members