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docs: fix duplicate headings in overlayfs driver page#24428

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dvdksn:fix/issue-18191-overlayfs-duplicate-sections
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docs: fix duplicate headings in overlayfs driver page#24428
dvdksn wants to merge 1 commit intodocker:mainfrom
dvdksn:fix/issue-18191-overlayfs-duplicate-sections

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@dvdksn dvdksn commented Mar 19, 2026

Summary

  • Fixes Overlayfs-driver docs have two similar sections #18191
  • The overlayfs-driver.md page had two sections with identical headings: ### Image and container layers on-disk
  • The first section (line 120) describes the overlay2 driver's layer layout on disk
  • The second section (line 227) describes the legacy overlay driver's layer layout on disk
  • Renamed the second heading to ### Image and container layers on-disk (legacy overlay driver) to make the distinction clear

Test plan

  • Verify the page renders correctly at /engine/storage/drivers/overlayfs-driver/
  • Confirm no duplicate heading IDs exist on the page
  • Confirm anchor links to both sections work correctly

🤖 Generated with Claude Code

Rename the second "Image and container layers on-disk" section heading to
"Image and container layers on-disk (legacy overlay driver)" to distinguish
it from the overlay2 section above it. Fixes docker#18191.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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@github-actions github-actions bot added area/engine Issue affects Docker engine/daemon area/storage Relates to storage, volumes labels Mar 19, 2026
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Assessment: 🟢 APPROVE

This PR successfully fixes the duplicate heading issue reported in #18191. The change is clean and appropriate:

Heading disambiguation: The second "Image and container layers on-disk" heading (line 227) is now clearly labeled as "(legacy overlay driver)" to distinguish it from the first section about overlay2
Minimal scope: The change only affects what's necessary to fix the duplicate heading issue
Formatting cleanup: The indentation changes to the definition list are valid Markdown formatting normalization

The renamed heading makes it clear to readers that the second section describes the legacy overlay driver's on-disk structure, improving navigation and reducing confusion.

No issues found. Ready to merge.

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Overlayfs-driver docs have two similar sections

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