[GSOC] Blog about week 7

Hello everyone!

Over the last week, I continued my work on generation number v2. It's usuable but is failing tests for t5324-split-commit-graph and t6600-test-reach. I am going to send out the patch to mailing list as soon as the tests are fixed.

Here's what is left for the patch series (which I intend take on for the
second version):
- Add an option to skip writing generation data chunk (to test whether
  new Git works without GDAT as intended).
- Handle writing to commit-graph with mismatched versions (that is,
  merge all commit graphs into a new commit graph with GDAT chunk).

I would be grateful for a pre-release review, just to make sure I am on the right track.

https://github.com/gitgitgadget/git/pull/676

https://abhishekkumar2718.github.io/gsoc/2020/07/21/gsoc-week-7.html

Thanks Abhishek