[PATCH 0/6] some diff --cc --stat fixes

This started as a follow-up to my "something like this" bug-fix from last July:

 https://public-inbox.org/git/20180710203438.GB6886@sigill.intra.peff.net/

(better late than never). But in the course of that, I discovered another really weird and interesting bug with --color-moved. This fixes both, along with some related cases.

-Peff

  [1/6]: t4006: resurrect commented-out tests
  [2/6]: diff: clear emitted_symbols flag after use
  [3/6]: combine-diff: factor out stat-format mask
  [4/6]: combine-diff: treat --shortstat like --stat
  [5/6]: combine-diff: treat --summary like --stat
  [6/6]: combine-diff: treat --dirstat like --stat

 combine-diff.c                                | 17 ++--
 diff.c                                        |  4 +-
 t/t4006-diff-mode.sh                          | 55 +++++++------
 t/t4013-diff-various.sh                       |  9 +++
 .../diff.diff-tree_--cc_--shortstat_master    |  4 +
 t/t4013/diff.diff-tree_--cc_--summary_REVERSE |  6 ++
 .../diff.diff_--dirstat_--cc_master~1_master  |  3 +
 t/t4066-diff-emit-delay.sh                    | 79 +++++++++++++++++++
 8 files changed, 147 insertions(+), 30 deletions(-)
 create mode 100644 t/t4013/diff.diff-tree_--cc_--shortstat_master
 create mode 100644 t/t4013/diff.diff-tree_--cc_--summary_REVERSE
 create mode 100644 t/t4013/diff.diff_--dirstat_--cc_master~1_master
 create mode 100755 t/t4066-diff-emit-delay.sh