Merge branch 'maint'

* maint:
  Document core.excludesfile for git-add
  git-send-email: allow leading white space on mutt aliases

git-send-email.perl

@@ -212,7 +212,7 @@ my $aliasfiletype = $repo->config('sendemail.aliasfiletype');
 my %parse_alias = (
 	# multiline formats can be supported in the future
 	mutt => sub { my $fh = shift; while (<$fh>) {
-		if (/^alias\s+(\S+)\s+(.*)$/) {
+		if (/^\s*alias\s+(\S+)\s+(.*)$/) {
 			my ($alias, $addr) = ($1, $2);
 			$addr =~ s/#.*$//; # mutt allows # comments
 			 # commas delimit multiple addresses