Developer credits
Git commits in Moodle 2.5.x by Dmytro Vorona
commit 0927af1e8dc90155a705da19b621a33dfee9db6f Author: Dmytro Vorona <alendit@gmail.com> Date: Mon, 25 Mar 2013 21:19:25 +0800 Tag: v2.5.1 MDL-40297 Hide empty categories in my courses
commit 02e1c8ad20bbffb7a94eb68f8908e214036a5494 Author: Dmytro Vorona <alendit@gmail.com> Date: Mon, 25 Mar 2013 17:57:31 +0800 Tag: v2.5.1 MDL-38631 Fixed faulty add_category call, introduced in 758103