Titian Cernicova-Dragomir 8ab0a25211 Improve error messages when indexing into a type (#31379) ...

* Improved error messages when indexing an object type with a literal string, a literal string union or a string.

* Added more specific message when using the indexing operator with an incompatible index argument.

* Fixed spelling and error message.

2019-05-23 15:27:50 -07:00

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baselines/reference

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lib

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projects

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