[PATCH v2 0/4] Modernize read_graft_line implementation

Compared to v1:
- the first patch is dropped to make it easier to merge
- free_graft is now static function in commit.c

I don't know, what are exact rules about adding Reviewed-by footer, so I didn't add any.

Patryk Obara (4):
  sha1_file: fix hardcoded size in null_sha1
  commit: replace the raw buffer with strbuf in read_graft_line
  commit: implement free_commit_graft
  commit: rewrite read_graft_line

 builtin/blame.c |  2 +-
 commit.c        | 55 ++++++++++++++++++++++++++++++++-----------------------
 commit.h        |  4 ++--
 sha1_file.c     |  2 +-
 shallow.c       |  1 +
 5 files changed, 37 insertions(+), 27 deletions(-)