XML documentation doesn't render properly in the intellisense preview

The next image shows an example of how the IntelliSense preview looks when writing Haskell code using [alanz/vscode-hie-server](https://github.com/alanz/vscode-hie-server).


## Logs ##

### OmniSharp log ###
Post the output from Output-->OmniSharp log here

### C# log ###
Post the output from Output-->C# here

## Environment information ##

**VSCode version**: 1.46.1
**C# Extension**: 1.22.1

Dotnet Information
.NET Core SDK (gem�� "global.json"):
Version: 5.0.100-preview.5.20279.10
Commit: 8139f1b74e

Laufzeitumgebung:
OS Name: Windows
OS Version: 10.0.19041
OS Platform: Windows
RID: win10-x64
Base Path: C:\Program Files\dotnet\sdk\5.0.100-preview.5.20279.10\

Host (useful for support):
Version: 5.0.0-preview.5.20278.1
Commit: 4ae4e2fe08

.NET SDKs installed:
3.1.100 [C:\Program Files\dotnet\sdk]
3.1.300 [C:\Program Files\dotnet\sdk]
5.0.100-preview.5.20279.10 [C:\Program Files\dotnet\sdk]

.NET runtimes installed:
Microsoft.AspNetCore.All 2.1.2 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.All]
Microsoft.AspNetCore.App 2.1.2 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 3.1.0 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 3.1.4 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 5.0.0-preview.5.20279.2 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
Microsoft.NETCore.App 3.1.0 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.NETCore.App 3.1.4 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.NETCore.App 5.0.0-preview.5.20278.1 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.WindowsDesktop.App 3.1.0 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
Microsoft.WindowsDesktop.App 3.1.4 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
Microsoft.WindowsDesktop.App 5.0.0-preview.5.20278.3 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]

To install additional .NET runtimes or SDKs:
https://aka.ms/dotnet-download

Visual Studio Code Extensions

|Extension|Author|Version|
|---|---|---|
|abnf|forivall|1.0.0|
|auto-rename-tag|formulahendry|0.1.3|
|bash-ide-vscode|mads-hartmann|1.10.2|
|beautify|HookyQR|1.5.0|
|better-comments|aaron-bond|2.0.5|
|bracket-pair-colorizer-2|CoenraadS|0.1.4|
|code-settings-sync|Shan|3.4.3|
|code-spell-checker|streetsidesoftware|1.9.0|
|colonize|vmsynkov|2.2.2|
|csharp|ms-dotnettools|1.22.1|
|csharpextensions|jchannon|1.3.1|
|docomment|k--kato|0.1.13|
|dotnet-test-explorer|formulahendry|0.7.3|
|EditorConfig|EditorConfig|0.15.1|
|errorlens|usernamehw|3.1.1|
|gc-excelviewer|GrapeCity|3.0.37|
|git-graph|mhutchie|1.24.0|
|gitignore|codezombiech|0.6.0|
|gitlens|eamodio|10.2.2|
|jinja|wholroyd|0.0.8|
|js-debug-nightly|ms-vscode|2020.6.2917|
|language-haskell|justusadam|3.3.0|
|language-x86-64-assembly|13xforever|2.3.0|
|markdown-all-in-one|yzhang|3.1.0|
|material-icon-theme|PKief|4.2.0|
|msbuild-project-tools|tintoy|0.3.6|
|npm-intellisense|christian-kohler|1.3.0|
|open-in-browser|techer|2.0.0|
|output-colorizer|IBM|0.1.2|
|path-autocomplete|ionutvmi|1.13.6|
|penguor|carl-schierig|0.0.3|
|project-manager|alefragnani|11.1.0|
|python|ms-python|2020.6.90262|
|remote-wsl|ms-vscode-remote|0.44.4|
|restructuredtext|lextudio|128.0.0|
|rewrap|stkb|1.12.0|
|search-node-modules|jasonnutter|1.3.0|
|sort-lines|Tyriar|1.9.0|
|TabOut|albert|0.2.0|
|tinypng|andi1984|0.3.3|
|todo-tree|Gruntfuggly|0.0.177|
|turbo-console-log|ChakrounAnas|1.4.0|
|vsc-material-theme|Equinusocio|32.8.0|
|vscode-colorize|kamikillerto|0.8.17|
|vscode-counter|uctakeoff|1.3.5|
|vscode-csharp-snippets|jorgeserrano|0.3.1|
|vscode-eslint|dbaeumer|2.1.5|
|vscode-html-css|ecmel|0.2.3|
|vscode-jumpy|wmaurer|0.3.1|
|vscode-markdownlint|DavidAnson|0.36.1|
|vscode-npm-script|eg2|0.3.12|
|vscode-nuget-package-manager|jmrog|1.1.6|
|vscode-solution-explorer|fernandoescolar|0.3.10|
|vscode-xml|redhat|0.12.0|
|vscode-yaml|redhat|0.8.0|
|zenscript|yesterday17|0.2.6|;