TS arrow functions in classes break theme coloring.

[aeschli]

From @nozzlegear on March 9, 2016 16:3

Adding an arrow function to a TS class breaks the VSCode theme. Compare this screenshot:

To this one, after changing the Test function to an arrow function:

I've tested this in both the Dark default and Light default theme, bug is present in both themes. It's also present in both .ts and .tsx files. I'm using VSCode version 0.10.10.

Steps to reproduce:

1. Create a new TS file and give it a class.
2. Add two normal functions to that class (i.e. public SomeMethod() { } public OtherMethod() { } ).
3. Change the first function to an arrow function ( public SomeMethod = () => { } ).
4. Theme colors on all functions below SomeMethod are now broken.

Copied from original issue: microsoft/vscode#3919

[sheetalkamat]

Fixed by #257