Comment by gsylvie

I find their branching model interesting (no merges ever!):

  $ git log --graph --oneline --decorate --date-order --all

  * 86d911ec0f (HEAD -> master, origin/master, origin/HEAD) Allow index...
  * 7c5d8c16e1 Add explicit ORDER BY to a few tests that exercise hash-...
  | * 1888fad440 (origin/REL9_4_STABLE) Fix roundoff problems in float8...
  | | * 7786b98482 (origin/REL9_5_STABLE) Fix roundoff problems in float8...
  | | | * 404756fe89 (origin/REL9_6_STABLE) Fix roundoff problems in float8...
  * | | | 8f93bd8512 Fix roundoff problems in float8_timestamptz() and make...
  * | | | a507b86900 Add WAL consistency checking facility.
  * | | | 115cb31597 Fix relcache leaks in get_object_address_publication_rel()
  * | | | e35bbea7dd doc: Some improvements in CREATE SUBSCRIPTION ref page
  * | | | c3c4f6e174 Revise the way the element allocator for a simplehash...
  * | | | 242066cc8e Speed up "brin" regression test a little bit.
  * | | | ac8eb972f2 Avoid redefining simplehash_allocate/simplehash_free.
  * | | | 565903af47 Allow the element allocator for a simplehash to be specified.
  * | | | 94708c0e8c Fix compiler warning.
  * | | | 293e24e507 Cache hash index's metapage in rel->rd_amcache.
  | | | | * 903bfef382 (tag: REL9_2_20, origin/REL9_2_STABLE) Correct thinko...
  | | | | | * 4dd4e3fe10 (origin/REL9_3_STABLE) Correct thinko in last-minute...
  | * | | | | cd898769cb Correct thinko in last-minute release note item.
  | | * | | | 13b30ada99 Correct thinko in last-minute release note item.
  | | | * | | ae8a602c32 Correct thinko in last-minute release note item.
  * | | | | | 39c3ca5161 Correct thinko in last-minute release note item.