[w3c/manifest] Editorial: clarify when/how 'auto' is applied (#926)

Closes #923 

This change (choose at least one, delete ones that don't apply):

* Makes editorial changes (changes informative sections, or changes normative sections without changing behavior)

Commit message:
Clarified how "auto" works.


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<a href="https://pr-preview.s3.amazonaws.com/w3c/manifest/pull/926.html" title="Last updated on Jul 20, 2020, 7:27 AM UTC (cc2203c)">Preview</a> | <a href="https://pr-preview.s3.amazonaws.com/w3c/manifest/926/96246fb...cc2203c.html" title="Last updated on Jul 20, 2020, 7:27 AM UTC (cc2203c)">Diff</a>
You can view, comment on, or merge this pull request online at:

  https://github.com/w3c/manifest/pull/926

-- Commit Summary --

  * Editorial: clarify when/how 'auto' is applied

-- File Changes --

    M index.html (21)

-- Patch Links --

https://github.com/w3c/manifest/pull/926.patch
https://github.com/w3c/manifest/pull/926.diff

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Received on Monday, 20 July 2020 07:27:55 UTC