[Preview] First line in output after running any command is misaligned

[PrzemyslawKlys]

Issue Description

I am experiencing a problem with... extra tabs added to the first line.

It behaves the same for Warning/Verbose/Host or any other output. Always the first line has one or more tabs added making pretty output not so pretty.

Add:

Write-Host 'Test'
Write-Host 'Test2'

Run with F5:

Should be 0 tabs in the front for first Test.

Environment Information

Visual Studio Code

Name	Version
Operating System	Windows_NT x64 10.0.18363
VSCode	1.41.0
PowerShell Extension Version	2019.12.0

PowerShell Information

Name	Value
PSVersion	7.0.0-rc.1
PSEdition	Core
GitCommitId	7.0.0-rc.1
OS	Microsoft Windows 10.0.18363
Platform	Win32NT
PSCompatibleVersions	1.0 2.0 3.0 4.0 5.0 5.1.10032.0 6.0.0 6.1.0 6.2.0 7.0.0-rc.1
PSRemotingProtocolVersion	2.3
SerializationVersion	1.1.0.1
WSManStackVersion	3.0

Visual Studio Code Extensions

Visual Studio Code Extensions(Click to Expand)

Extension	Author	Version
auto-rename-tag	formulahendry	0.1.1
beautify	HookyQR	1.5.0
bracket-pair-colorizer-2	CoenraadS	0.0.29
code-settings-sync	Shan	3.4.3
codesnap	adpyke	1.0.24
excel-to-markdown-table	csholmq	1.1.0
gistfs	vsls-contrib	0.0.21
github-linker	gimenete	0.2.3
gitlens	eamodio	10.2.0
html-preview-vscode	george-alisson	0.2.5
markdown-all-in-one	yzhang	2.6.1
markdown-preview-enhanced	shd101wyy	0.5.0
markdown-shortcuts	mdickin	0.12.0
material-icon-theme	PKief	3.9.2
pdf	tomoki1207	0.5.1
powershell-preview	ms-vscode	2019.12.0
project-manager	alefragnani	10.9.1
reg	ionutvmi	1.0.1
theme-monokai-pro-vscode	monokai	1.1.14
vscode-html-css	ecmel	0.2.3
vscode-markdownlint	DavidAnson	0.33.0
vscode-pull-request-github	GitHub	0.13.0
vscode-wakatime	WakaTime	2.2.1
vscode-yaml	redhat	0.6.1
xml	DotJoshJohnson	2.5.0