[PATCH v1 0/4] add parent rewrite feature to line level log

With this series of patches, one can provide options such as '--graph', '--parents', '--simplify-merges' and etc to 'git log -L' command and get the right result.
Note that, this series is based on the previous series 'the version 3 of 13 commits just posted to the list'. :-)

Bo Yang (4):
  make rewrite_parents a external function
  add parent rewrite feature to line level log
  line.c output the '--graph' padding before each line
  add test cases for '--graph' of line level log

 Documentation/git-log.txt          |    2 +
 line.c                             |  177 ++++++++++++++++++++++++-----
 line.h                             |    2 +
 revision.c                         |   14 +--
 revision.h                         |   10 ++
 t/t4301-log-line-single-history.sh |  225 ++++++++++++++++++++++++++++++++++++
 t/t4302-log-line-merge-history.sh  |   51 ++++++++-
 7 files changed, 445 insertions(+), 36 deletions(-)