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Git commits in Moodle 3.1.6 by Ruslan Kabalin
commit 231a80c01048292e833359d795497d8a37f2879b Author: Ruslan Kabalin <r.kabalin@lancaster.ac.uk> Date: Fri, 07 Apr 2017 18:57:35 +0800 Tag: v3.1.6 MDL-58539 assignfeedback_editpdf: Fix group assignment fatal error.