Developer credits
Git commits in Moodle 2.9.1 by GeekSmith
commit 7c6d8dd8e0932d2821ffda5ab2f6a184019d76af Author: GeekSmith <cbmegahan@geeksmith.com> Date: Sat, 13 Jun 2015 04:21:50 +0800 Tag: v2.9.1 MDL-50583 upgrade: Optimize upgrade_minmaxgrade
commit 7c6d8dd8e0932d2821ffda5ab2f6a184019d76af Author: GeekSmith <cbmegahan@geeksmith.com> Date: Sat, 13 Jun 2015 04:21:50 +0800 Tag: v2.9.1 MDL-50583 upgrade: Optimize upgrade_minmaxgrade