bug#63810: 29.0.91; typescript-ts-mode grammar missing the "is" keyword

[Theodor Thornhill]

On 31 May 2023 14:21:50 CEST, Eli Zaretskii <eliz@gnu.org> wrote:
>> From: Jimmy Yuen Ho Wong <wyuenho@gmail.com>
>> Date: Wed, 31 May 2023 08:30:14 +0100
>> 
>> 1. C-x C-f test.ts
>> 2. Insert
>>    ```typescript
>>    function isFish(pet: Fish | Bird): pet is Fish {
>>      return (pet as Fish).swim !== undefined;
>>    }
>>    ```
>> 3. Observe the `is` keyword isn't highlighted.
>> 
>> Expectation:
>> 
>> TypeScript has a concept called type predicates, which introduces a
>> keyword called `is`.
>
>Thanks.
>
>Can you guys please look into this?

Thanks for the ping. Will look into it this evening.

Theo