Sergey Biryukov a4b65bfca8 Date/Time: Ensure that get_feed_build_date() correctly handles a modified post object with invalid date.
* Clarify in the documentation that the function returns `false` on failure.
* Consistently pass the return value through the `get_feed_build_date` filter.

Props Rarst, dd32, azaozz, tellyworth.
Fixes #48957.

git-svn-id: https://develop.svn.wordpress.org/trunk@46974 602fd350-edb4-49c9-b593-d223f7449a82
2019-12-17 20:41:09 +00:00
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