[RFC PATCHv3 0/4] am: patch-format

I've re-ordered things in this round. Hopefully the first 3 patches are uncontroversial, Junio has expressed reservations about the 4th. I haven't looked at moving the changes into mailsplit yet or I could try and update gitk to use something other than diff-tree or I could write some external filter programs.

Chris Packham (4):
  am: avoid re-directing stdin twice
  t/am: add test for stgit patch format
  t/am: add tests for hg patch format
  am: add gitk patch format

 Documentation/git-am.txt |  3 +-
 git-am.sh                | 38 +++++++++++++++++++++++-
 t/t4150-am.sh            | 76 ++++++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 115 insertions(+), 2 deletions(-)