ASP.NET Razor formatter removes duplicate spaces in a string value

[RomanKoff]

Type: Bug

Issue Description

If you specify multiple spaces in a row in the value of a string variable and apply code formatting, the double spaces will be replaced with a single space. This is unacceptable.

Before:
var s1 = " test test ";

After formating:
var s1 = " test test ";

2025-05-30.13-54-42.mp4

[davidwengier]

Thanks for the report @RomanKoff, unfortunately I can't repro the issue, and judging from the video it seems like for whatever reason that code is not being seen as C#. You can see in the video how, when you place the cursor to the left of test it highlights the word, but that doesn't happen inside string literals.

Would it be possible for you to share more details of your setup? What version of the extension are you using? Do you have the OmniSharp setting turned on? Could you share the whole Razor file that you're editing in the video?

If it's easier, running the "Razor: Report a Razor issue" command in VS Code should capture all of the relevant details for us.

[RomanKoff]

Extensions:

• .NET Install Tool
• C#
• C# Dev Kit
• HTML CSS Support
• HTMLHint
• IntelliSense for CSS class names in HTML
• SCSS IntelliSense
• Visual Studio Keymap
• vscode-typograf
• XML

settings.json

{
    "editor.codeLens": false,
    "editor.foldingMaximumRegions": 10000,
    "editor.fontSize": 17,
    "editor.largeFileOptimizations": false,
    "editor.lineHeight": 1.5,
    "editor.linkedEditing": true,
    "editor.minimap.showSlider": "always",
    "editor.scrollbar.horizontal": "visible",
    "editor.scrollbar.vertical": "visible",
    "editor.wordWrap": "wordWrapColumn",
    "editor.wordWrapColumn": 120,
    "explorer.confirmDelete": false,
    "explorer.confirmDragAndDrop": false,
    "files.hotExit": "off",
    "git.openRepositoryInParentFolders": "never",
    "html.format.wrapLineLength": 0,
    "redhat.telemetry.enabled": false,
    "window.newWindowDimensions": "offset",
    "workbench.colorTheme": "Default Light Modern",
    "workbench.list.openMode": "doubleClick",
    "workbench.sideBar.location": "right",
    "workbench.startupEditor": "none",
    "workbench.tree.indent": 16,
    "[xml]": {
        "editor.autoClosingBrackets": "never",
        "files.trimFinalNewlines": true
    },
    "editor.unicodeHighlight.invisibleCharacters": false,
    "editor.unicodeHighlight.ambiguousCharacters": false,
    "security.workspace.trust.untrustedFiles": "open",
    "explorer.confirmPasteNative": false,
    "[csharp]": {
        "editor.acceptSuggestionOnCommitCharacter": false
    },
}

[davidwengier]

@RomanKoff Are you still running into this? I never could reproduce, and we haven't seen any other reports of this issue.

[RomanKoff]

Yes. Relevant. This behavior occurs on different machines.

[davidwengier]

Awesome! The good news is since you logged this issue we have some new logging that has been very effective at helping us track down weird formatting issues like this. Could you please capture the formatting logs from this occurring, and share them? Either here, or email them to me directly, david dot wengier at microsoft dot com.

Instructions for the extra logging are here: https://github.com/dotnet/razor/blob/main/docs/Formatting.md#turn-on-formatting-logging

[RomanKoff]

As I understand it, you need this

20251203_142325120_Full_start_cshtml.zip

[davidwengier]

Thank you, that makes it so much easier to repro for me, I'm honestly not sure what I was doing before when I said I couldn't :)