Author: Andrew Nicols
MDL-44164 atto: Refactor the world
http://git.moodle.org/gw?p=moodle.git;a=commit;h=6246779510e768cd36f281d170dbfdd6ba75fec4
http://github.com/moodle/moodle/commit/6246779510e768cd36f281d170dbfdd6ba75fec4
+ 2.7 en [showfewer,atto_collapse]
- 2.7 en [showless,atto_collapse]