As I understood, the whole point of limiting the commit summary to 78 characters was for people not having to scroll to see it, and for automatic tools now to word-wrap it. And truncating the last few characters and replacing them with
..., only for those few characters to appear on a line of their own is the opposite of style and readability.
Limit of 78 characters was fine when the commit messages were frequently viewed in 80 column consoles. But now that we have switched to GitHub which imposes 72 character limit, we should consider switching to that limit in ITK commit hook enforcement.