Consider inverting tsc line number's fg/bg rather than setting the fg/bg colors to ensure contrast

[Tyriar]

Tested on typescript@3.0.3

Light+ in VS Code (bad):

A dark theme in VS Code (fine):

Terminal.app (fine):

[DanielRosenwasser]

Feel free to send a PR! You probably know more about PTTYs than I do at this point ;)

[Tyriar]

@DanielRosenwasser I spent a while looking for where this line number is printed but couldn't see it, I'd be happy to if you could you give me a pointer to the file where the line number is rendered?

[DanielRosenwasser]

Check out the usages of gutterStyleSequence in program.ts:

https://github.com/Microsoft/TypeScript/blob/6fb0f6818ad48bf4f685e86c03405ddc84b530ed/src/compiler/program.ts#L253

[Tyriar]

@DanielRosenwasser done 😃