Merge branch 'maint'

* maint:
  for-each-ref: fix off by one read.
  git-branch: remove mention of non-existent '-b' option
  git-svn: prevent dcommitting if the index is dirty.
  Fix memory leak in traverse_commit_list

diff --cc Documentation/git-branch.txt
Simple merge

diff --cc builtin-for-each-ref.c
Simple merge

diff --cc git-svn.perl
Simple merge