Sergey Biryukov 4daf6f4603 Improve handling the existing rel attribute in wp_rel_nofollow_callback().
Merges [45990] to the 4.9 branch.
Props xknown, sstoqnov.

git-svn-id: https://develop.svn.wordpress.org/branches/4.9@45994 602fd350-edb4-49c9-b593-d223f7449a82
2019-09-04 17:47:09 +00:00
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