Fix typo on about page.

props helen.
see #27713.

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Allow the API to add text to auto update emails.

fixes #27812.

Built from https://develop.svn.wordpress.org/trunk@28134


git-svn-id: http://core.svn.wordpress.org/trunk@27965 1a063a9b-81f0-0310-95a4-ce76da25c4cd
3.9-RC2

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git-svn-id: http://core.svn.wordpress.org/trunk@27966 1a063a9b-81f0-0310-95a4-ce76da25c4cd