Files
wordpress/wp-includes
Scott Taylor 980744f882 In wp_insert_term(), when no slug is provided, check for an existing term by name. If it exists, use that slug instead of calling sanitize_title( $name ).
Prevents creating an endless number of terms like `A+` or `$$$$` in any given taxonomy.

Props wonderboymusic, SergeyBiryukov, aaroncampbell.
Fixes #17689.

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git-svn-id: http://core.svn.wordpress.org/trunk@28547 1a063a9b-81f0-0310-95a4-ce76da25c4cd
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