Wrong cursor position in intergrated terminal with speical character left of prompt

[OpportunityLiu]

Issue Type: Bug

1. Install posh-git
2. Open powershell in intergrated terminal
3. Run Import-Module posh-git
4. Set working directory to a git folder to show the git status in prompt
5. Input any command with space, i.e. ls . -Recurse, the cursor position is wrong
   

VS Code version: Code 1.24.0 (6a6e02c, 2018-06-06T17:35:40.560Z)
OS version: Windows_NT x64 10.0.17134

System Info

Item	Value
CPUs	Intel(R) Core(TM) i7-6700HQ CPU @ 2.60GHz (8 x 2592)
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: disabled_software rasterization: disabled_software video_decode: enabled video_encode: enabled vpx_decode: unavailable_software webgl: enabled webgl2: enabled
Memory (System)	7.83GB (2.94GB free)
Process Argv	C:\Program Files\Microsoft VS Code\Code.exe
Screen Reader	no
VM	0%

Extensions (19)

Extension	Author (truncated)	Version
gitignore	cod	0.5.0
vscode-eslint	dba	1.4.12
githistory	don	0.4.1
xml	Dot	2.3.0
vscode-html-css	ecm	0.2.0
tslint	eg2	1.0.30
docker-explorer	for	0.1.6
matlab	Gim	0.9.0
rainbow-csv	mec	0.4.1
vscode-language-pack-zh-hans	MS-	1.24.3
cpptools	ms-	0.17.4
csharp	ms-	1.15.2
PowerShell	ms-	1.7.0
vscode-docker	Pet	0.0.27
code-settings-sync	Sha	2.9.2
hosts	tom	0.0.8
gitblame	wad	2.4.2
vscode-cil-complete	wk-	0.0.5
markdown-all-in-one	yzh	1.4.0

[vscodebot]

(Experimental duplicate detection)
Thanks for submitting this issue. Please also check if it is already covered by an existing one, like:

• Intergrated Terminal (#50778)

[OpportunityLiu]

It seems there is something wrong with character ≡, the following step also reproduces:

C:\> mkdir ≡
C:\> cd ≡
C:\≡> ls . -Recurse

[yume-chan]

I can't reproduce this problem with the mkdir ≡ way in both 1.24.0 and 1.25.0-insider.

(In the gif the terminal.integrated.cursorStyle is line, but I also tried with block)

[Tyriar]

I'm guessing this is related to ambiguous character width, see xtermjs/xterm.js#1467

[OpportunityLiu]

@yume-chan
Can reproduce on 3 different computers.
Are you using powershell on windows?

@Tyriar
Tried again with "terminal.integrated.rendererType": "dom".
There is also a redundant <span> <span>

[yume-chan]

Are you using powershell on windows?

Yes, I'm using Windows 10 1803 x64 in English, PowerShell, and I'm also using posh-git.

[Tyriar]

This is likely related to winpty, tracking in #45693