[Bug]: VSCode GNAT Project file syntax highlighting uses incorrect color locations when indenting with tabs

[MegaKonami]

Environment

• OS and Version: Windows 64-bit
• IDE Version: VSCode 1.116.0
• Ada & SPARK Extension Version: 2026.2.202604091

Bug Summary and Reproducer

Bug Summary:
The position of syntax highlighting markers for GNAT Project files (.gpr) is incorrectly offset when using tabs instead of spaces for indention.

Steps to reproduce:

1. Create a GPR file (using indenting)
2. If indenting with spaces, convert Indenting to tabs
3. Observe

Expected behavior:
Coloration would correlate to keyword positions.

Configuration and Logs

{
  "editor.detectIndentation": false,
  "editor.tabSize": 3,
  "editor.insertSpaces": false
}

Other VS Code Extensions

No response

Additional context

With Spaces:
.vscode/settings.json

{
  "editor.detectIndentation": false,
  "editor.indentSize": "tabSize",
  "editor.tabSize": 3,
  "editor.insertSpaces": true
}

With Tabs:
.vscode/settings.json

{
  "editor.detectIndentation": false,
  "editor.indentSize": "tabSize",
  "editor.tabSize": 3,
  "editor.insertSpaces": false
}

[AnthonyLeonardoGracio]

Hello @MegaKonami,

Thanks for the bug report, we will let you know once it's fixed.

Regards,