Sdk diff PRs have unnecessary whitespace diffs

[ellahathaway]

See https://dev.azure.com/dnceng/internal/_git/dotnet-dotnet/commit/4a47f977c88d62107c502090e1091880fc330e72/

[github-actions]

🏷️ Source-build triage pass — 2026-06-29 19:38 UTC

📋 Classification

Field	Value
Area	area-testing
Additional area(s)	none
Kind	bug
Severity	S3 — introduces noise in SDK diff PRs with spurious whitespace changes; manual workaround (reviewing/ignoring whitespace diffs) exists
Affected version(s)	current
Repro	needs-info — issue body only contains a link to an internal Azure DevOps commit (not publicly accessible); no description of steps, scope, or affected tooling

🚦 Priority

• Blocking: not blocking
• Urgency: ⚪ backlog — no milestone

  Whitespace noise in SDK diff PRs is developer friction but does not block any release or CI pipeline.

👥 Routing

• Team: @dotnet/source-build
• Possible SME(s): ellahathaway, mthalman
  • ellahathaway — active on SDK diff test issues SDK Diff pipeline should discover artifacts from upstream builds with post-build failures #5536 (SDK Diff pipeline artifact discovery) and SDK diff test failure: System.CommandLine.resources.dll version mismatch on internal/release/10.0.2xx #5526 (SDK diff test failure), author of this issue
  • mthalman — active on Reduce maintenance cost of Source-Build SDK Diff Tests baselines and exclusions #5598 (Reduce maintenance cost of SDK Diff Tests baselines) and Source Build Outer Loop failing on main: NETSDK1242 building mobile targets with Mono on .NET 11 #5603 (outer loop build failures); familiar with SDK diff infrastructure

🔗 Cross-references

• Recommended labels: add area-testing
• Related issues: Reduce maintenance cost of Source-Build SDK Diff Tests baselines and exclusions #5598 (reduce SDK diff test maintenance cost), SDK Diff pipeline should discover artifacts from upstream builds with post-build failures #5536 (SDK Diff pipeline artifact discovery), SDK diff test failure: System.CommandLine.resources.dll version mismatch on internal/release/10.0.2xx #5526 (SDK diff test failure)
• Possible duplicate of: none

✅ Assessment

• Confidence: low — issue body is a single internal link with no description; classification is based on title alone
• Needs human?: yes — needs more context: what tooling generates the whitespace diffs, which branches/repos are affected, and whether the internal commit link contains enough detail to reproduce

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[ellahathaway]

Needs dotnet/dotnet#7329 backported