Change preview in moderne.io shows tabs vs spaces substitutions as actual changes whereas generated diffs or PRs do not include those

Problem

When applying a recipe that is changing tabs to spaces in a line, this change gets rendered as a real change in the UI even though the PR or patch created will not contain that change:

• screenshot from this page

• • PR that does not contain the visualized diff in line 16: https://github.com/langchain-ai/langchainjs/pull/11504

Expected behavior

Have the same diff / visual diff everywhere

Example diff

From: .github/workflows/codeql.yml

     contents: read

jobs:
-  analyze:
+  analyze:
 name: Analyze (${{ matrix.language }})
 runs-on: "ubuntu-latest"
 permissions:

      uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1

- name: Initialize CodeQL
-        uses: github/codeql-action/init@db488ddef3bf6cb639b32c2e9a7c0a7ea8271d28 # v4.37.8
+        uses: github/codeql-action/init@5595ccaf912efad79be6eef63a5619ff05969be3 # v4.37.8
with:
  languages: ${{ matrix.language }}
  config-file: ./.github/codeql/codeql-config.yml

- name: Perform CodeQL Analysis
-        uses: github/codeql-action/analyze@db488ddef3bf6cb639b32c2e9a7c0a7ea8271d28 # v4.37.8
+        uses: github/codeql-action/analyze@5595ccaf912efad79be6eef63a5619ff05969be3 # v4.37.8
with:
  category: "/language:${{matrix.language}}"
  output: results-${{matrix.language}}

      uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a # v7.0.1
with:
  name: codeql-results-${{matrix.language}}
-          path: results-${{matrix.language}}
+          path: results-${{matrix.language}}

Recipes in example diff:

• org.openrewrite.github.GitHubActionsBestPractices
• org.openrewrite.github.FindMissingTimeout
• org.openrewrite.github.UpgradeOfficialGitHubActions

References:

• View original result
• Recipe ID: org.openrewrite.github.FindMissingTimeout
• Recipe Name: Find jobs missing timeout
• Repository: langchain-ai/langchainjs/main
• Created at Sun Aug 30 2026 13:56:09 GMT+0200 (Central European Summer Time)

Compare the moderne.io change preview for .github/workflows/codeql.yml with the generated PR for langchain-ai/langchainjs#11504, focusing on tabs-versus-spaces rendering. Reproduce with org.openrewrite.github.FindMissingTimeout and the listed GitHub Actions recipes. Done means the preview and generated PR or patch show the same diff.