Docs: Properly mark the `$exclude_zeros` parameter in the DocBlock for...

Docs: Properly mark the `$exclude_zeros` parameter in the DocBlock for `get_editable_user_ids()` as optional.

Also fixes a couple of typos.

See #32246.

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git-svn-id: https://core.svn.wordpress.org/trunk@36035 1a063a9b-81f0-0310-95a4-ce76da25c4cd