* Support a "getCombinedCodeFix" service
* Rename things
* Code review
* Rename things
* Update API baselines
* CodeActionAll -> CombinedCodeActions
* Take a `scope` parameter instead of `fileName` for flexibility
* Renames and bugfixes
* Make API changes internal
* Code review
* Update comment
* For import fix, prefer symlink over a real path
* fixes
* Use best result from all symlinks
* Make originalPath optional more
* Only include real path if a symlink isn't available
* Lazily compute signature type predicates
* Use an instance of IdentifierTypePredicate to represent an unresolved type predicate
* Simplify `getMaybeTypePredicate`
* Invert representation of `resolvedTypePredicate`
* Remove `__unresolvedTypePredicate` type and remember to use `noTypePredicate` instead of `undefined` when in all `createSignature` calls
* Fix style of getTypePredicateOfSignature
* Use in createGetSymbolWalker
* Fix bugs for unions of type predicates
* Code review
* Make noTypePredicate purely an implementation detail of getTypePredictateOfSignature
* Add test
* Add test for #19642
* Add test with reversed order
I advocated against immediately clearing the console when starting --watch in #17756 because it was confusing to have the console suddenly become blank, wait a while, and _then_ give output. After using the feature for a little while, I think it's a little disorienting how the console will only start clearing after the first recompile. This change clears the console and immediately prints a new "Starting compilation in watch mode..." message.
* tsc --watch should clear screen on new compilation
* added optional clearScreen method to System]
* implemented via `x1Bc`, reset screen
* fixes 13020
* Feedback on if statements; api .d.ts baseline additions
* Stopped clearing screen in tsc.js's reportWatchMode
* Added unit tests
* Still instantiate the extends clause even when theres a noimplicitany error in js
* Only be permissive for JS
* In JS, instantiate classes even when they have too many type arguments, instead of returning unknownType
* 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