Blame with --ignore-revs doesn't group the same commit together for some lines

[verhovsky]

I have these lines in ~/.gitconfig

[blame]
    ignoreRevsFile = ~/.ignore-revs

in that file I put the hashes of a few large and useless commits like changing the formatter or mass-renamings, so that they don't show up in git blame. This works with Magit's blame, but it seems like it doesn't group the commits correctly and in the Magit blame view I'll sometimes get a a few lines in a row that are all shown as the same commit, but the line with the commit date and hash is repeated multiple times for lines that should be grouped

me        2019-10-05 12:12 "do stuff, commit A"
def foo():
me        2019-10-05 12:12 "do stuff, commit A"
    whatever()
me        2019-10-05 12:12 "do stuff, commit A"
    some_other_stuff()
    2 + 2
me        2019-10-05 12:12 "do stuff, some other commit B"
    return True
me        2019-10-05 12:12 "do stuff, commit A"

--ignore-revs and --ignore-revs-file were added to git blame fairly recently, in Git 2.23

[tarsius]

We get neighboring chunks that are attributed to the same commit because we use the --incremental argument. We could try to merge these chunks again in magit-blame--make-overlays.

[tarsius]

...but for the time being I am going to consider this a feature. 😜
Merging the neighboring chunks is not a priority at least.