The other day I saw a change described as "Added a word.". Yes, but /which/ word?
If you want to know which word, you can look at the diff. What I'd want to know is *why* they added it. "Added missing word", perhaps - then you know it was a mistake the word wasn't there before. "Added word to clarify", "Added word to disguise the fact that my employer eats babies", etc. would be useful information.