[TS] type parameters across multiple lines aren't highlighted properly

[peat-psuwit]

Issue Type: Bug

The following code highlights correctly in VSCode:

Object.assign<object, object>({}, {});

However, this code does not, despite being semantically the same:

Object.assign<
  object,
  object
>({}, {});

In the latter example, assign is supposed to be function-like yellow, and small-cased object is supposed to be type-like green. Instead, both of them are generic-blue.

Steps to reproduce:

1. Create a new file, ending with .ts.
2. Copy both of the sample codes into the file. Observe the difference between the first & the second code.

VS Code version: Code - Insiders 1.34.0-insider (d234937aedcbc265d2272ba5861125293239f9c7, 2019-04-05T05:13:22.859Z)
OS version: Linux x64 4.15.0-46-generic

System Info

Item	Value
CPUs	Intel(R) Core(TM)2 Duo CPU P7350 @ 2.00GHz (2 x 1669)
GPU Status	2d_canvas: enabled checker_imaging: disabled_off flash_3d: enabled flash_stage3d: enabled flash_stage3d_baseline: enabled gpu_compositing: enabled multiple_raster_threads: disabled_off native_gpu_memory_buffers: disabled_software rasterization: disabled_software surface_synchronization: enabled_on video_decode: unavailable_off webgl: enabled webgl2: enabled
Load (avg)	3, 3, 2
Memory (System)	3.60GB (0.34GB free)
Process Argv
Screen Reader	no
VM	0%

Extensions: none

[mjbvz]

Duplicate of #479 I believe