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Git commits in Moodle 3.1.2 by Henning Bostelmann
commit 9a6f6ee022c4d254653c46ee9b47a218d9d7c05f Author: Henning Bostelmann <henning.bostelmann@york.ac.uk> Date: Fri, 19 Aug 2016 00:01:12 +0800 Tag: v3.1.2 MDL-55627 filter_mathjaxloader: use correct string concatenation op