Merge branch 'master' of git://git.kernel.org/pub/scm/git/git

Merge branch 'master' of git://git./git/git

* 'master' of git://git.kernel.org/pub/scm/git/git: (57 commits)
  core-tutorial.txt: Fix git-show-branch example and its description
  git-commit: a bit more tests
  print warning/error/fatal messages in one shot
  builtin-blame: set up the work_tree before the first file access
  add a howto document about corrupted blob recovery
  Documentation: remove documentation for removed tools.
  Make check-docs target detect removed commands
  Documentation: lost-found is now deprecated.
  Update draft release notes for 1.5.4
  git-bisect.sh: Fix sed script to work with AIX and BSD sed.
  Start preparing for 1.5.3.6
  git-send-email: Change the prompt for the subject of the initial message.
  SubmittingPatches: improve the 'Patch:' section of the checklist
  instaweb: Minor cleanups and fixes for potential problems
  stop t1400 hiding errors in tests
  Makefile: add missing dependency on wt-status.h
  refresh_index_quietly(): express "optional" nature of index writing better
  Fix sed string regex escaping in module_name.
  Avoid a few unportable, needlessly nested "...`...".
  Style: place opening brace of a function definition at column 1
  ...