Merge pull request #12 from tanraya/master

Я тебе покушать принёс
Use += here, too
Add editor#delete_definition
Revert "Add editor#delete_definition"

This reverts commit f88731c4e597d419bd08e96c0c8b037e049120e3.
Well, editor#save!111
Just remembered the history tracking :)
Oh shit we are fucked
Fixes
Merge remote-tracking branch 'upstream/master'