The following set of patches implements Junio's excellent idea of printing the commit-8 only on the leading row of a commit block, as well as implementing mouse-over title of the author and the date of the commit. Thus making the output of git_blame2() less cluttered yet able to give more information should the user mouse-over the commit.
The difference is that this implementations doesn't use a "stack-like" chunk to represent each block-per-commit, thus eliminating the concern of rare but present files with 100s of 1000s of lines with only an initial commit.
Luben