Merge branch 'master' into next

* master:
  Merge part of kh/svnimport branch into master
  contrib/git-svn: correct commit example in manpage
  contrib/git-svn: tell the user to not modify git-svn-HEAD directly
  gitview: Remove trailing white space
  gitview: Fix the encoding related bug
  git-format-patch: Always add a blank line between headers and body.
  combine-diff: Honour -z option correctly.
  combine-diff: Honour --full-index.