Developer credits
Git commits in Moodle 3.1.x by David Bogner
commit 18937c1577b69ac2508f965ff86a5424b26a80b6 Author: David Bogner <davidbogner@gmail.com> Date: Tue, 13 Dec 2016 22:04:13 +0800 Tag: v3.1.5 MDL-57374 editor: Pasting plain text in Atto removes all styles/classes