Hint on character only has two dots

[chrmarti]

Issue Type: Bug

Testing #52218

On first character in document on two dots are shown:

VS Code version: Code - Insiders 1.25.0-insider (f2fa6be, 2018-06-27T05:11:02.122Z)
OS version: Darwin x64 17.6.0

System Info

Item	Value
CPUs	Intel(R) Core(TM) i7-4770HQ CPU @ 2.20GHz (8 x 2200)
GPU Status	2d_canvas: enabled flash_3d: enabled flash_stage3d: enabled flash_stage3d_baseline: enabled gpu_compositing: enabled multiple_raster_threads: enabled_on native_gpu_memory_buffers: enabled rasterization: enabled video_decode: enabled video_encode: enabled vpx_decode: enabled webgl: enabled webgl2: enabled
Load (avg)	2, 2, 3
Memory (System)	16.00GB (1.15GB free)
Process Argv	/Applications/Visual Studio Code - Insiders.app/Contents/MacOS/Electron --extensions-dir /Users/chrmarti/Development/repos/tmp/ext --user-data-dir /Users/chrmarti/Development/repos/tmp/user
Screen Reader	no
VM	20%

Extensions: none

[chrmarti]

Not just on the first character:

[jrieken]

@chrmarti Where does that marker come from?

[chrmarti]

@jrieken I added it through a test extension.

[jrieken]

So, the diagnostic is just for that one character, right?

[chrmarti]

Range(1, 1, 2, 1) and Range(1, 1, 1, 2) both show two dots, Range(1, 1, 1, 3) shows three.