Support page bundles in content root

[kaushalmodi]

Hello,

This issue was discovered by @RickCogley and discussed here.

The problem is that if a "leaf" bundle (page bundle with index.md) directory is put directly under content/, it gets rendered using the Section or list layout.

This prevents one to convert root level pages like content/about.md to page bundle structure: content/about/index.md.

[kaushalmodi]

In addition, what's surprising is that this behavior is inconsistent (atleast when using hugo server, using commit 6413559).

At times, the browser refreshes and shows that page with single layout. If I modify the index.md file, the browser auto-reloads and could show the same using list layout. That's really odd.. while I can consistently make this happen, I cannot figure out what causes single layout to load vs list layout.

[kaushalmodi]

Test file: Markdown | Hugo Output

[bep]

In addition, what's surprising is that this behavior is inconsistent (

This a race: it is both a section and a page bundle. It is random who will win.

[kaushalmodi]

Thank you! I confirm the fix.

[github-actions]

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