Theme Color Bug with typescript functions

[Phaze1D]

• VSCode Version: 1.20.1
• OS Version: macOS Hign Sierra Version 10.13.3

Steps to Reproduce:

1. When I add a newline to the params of a typescript arrow function the 'colorization' of the params fails

Correct Colors

Incorrect Colors

Does this issue occur when all extensions are disabled?: Yes

[mjbvz]

Duplicate of microsoft/TypeScript-TmLanguage#481 and similar upstream

Take a look at microsoft/TypeScript-TmLanguage#552