Boone Gorges 4407a710ce Ensure that wp_list_categories() supports comma-separated lists for 'exclude' and 'exclude_tree'.
[34696] introduced a regression whereby comma-separated values for 'exclude'
and 'exclude_tree' would be handled improperly when merging the two parameters,
resulting in category IDs being incorrectly dropped from the combined array.

Merges [36005] to the 4.4 branch.

Props gblsm, hnle.
Fixes #35156.


git-svn-id: https://develop.svn.wordpress.org/branches/4.4@36006 602fd350-edb4-49c9-b593-d223f7449a82
2015-12-18 18:13:58 +00:00
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