[PATCH 0/4] raising core.abbrev default to 12 hexdigits

Per request/suggestion by Linus. 

This took far more effort to keep the existing tests working than the actual change.

Junio C Hamano (4):
  config: allow customizing /etc/gitconfig location
  t13xx: do not assume system config is empty
  worktree: honor configuration variables
  core.abbrev: raise the default abbreviation to 12 hexdigits

 builtin/worktree.c     |  2 ++
 cache.h                |  1 +
 config.c               |  2 ++
 environment.c          |  2 +-
 t/gitconfig-for-test   |  9 +++++++++
 t/t1300-repo-config.sh | 39 ++++++++++++++++++++++++++++-----------
 t/t1308-config-set.sh  |  1 +
 t/test-lib.sh          |  4 ++--
 8 files changed, 46 insertions(+), 14 deletions(-)
 create mode 100644 t/gitconfig-for-test