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

git-svn.perl

@@ -390,6 +390,9 @@ sub cmd_set_tree {
 
 sub cmd_dcommit {
 	my $head = shift;
+	git_cmd_try { command_oneline(qw/diff-index --quiet HEAD/) }
+		'Cannot dcommit with a dirty index.  Commit your changes first'
+		. "or stash them with `git stash'.\n";
 	$head ||= 'HEAD';
 	my @refs;
 	my ($url, $rev, $uuid, $gs) = working_head_info($head, \@refs);