Git commits in Moodle 3.6.4 by Abhimanyu Kumar

commit 4abab601617fd215fa1300280a36b55dd7648194
Author: Abhimanyu Kumar <abhimanyukrsingh00@gmail.com>
Date:   Sat, 23 Mar 2019 21:09:26 +0800
Tag:    v3.6.4

MDL-64959 uploaduser: remove leading/trailing spaces from CSV headings