Your solution is just brilliant and a really cool hack. I will add this to my basic techniques. One suggestion: Change your article, instead of the sentence "he first set of brackets denotes deletion, the second set denotes addition, and the third set denotes a comment." write it the Ruleset for dumb people like me like this:

Ruleset:

First Brackets: [Deletion] Delete this word.

Second Brackets: [][Addition] Add this word.

Third Brackets: [][][Comment] Comment this word.

Combination Examples:

[Change][Replace] Delete first word, replace with second word...

[Remove][][My comment: You should remove this word!]