Porting/git-deltatool: print progress info to STDERR

Print output that's just displaying the progress of the tool to STDERR
instead of STDOUT. I can now do things like:

    git-deltatool --mode summary --type blocking | awk '{print $1}'

And not have the first line be "Scanning".

diff --git a/Porting/git-deltatool b/Porting/git-deltatool
index 315cb7b..35156e8 100644 (file)
--- a/Porting/git-deltatool
+++ b/Porting/git-deltatool
@@ -177,7 +177,7 @@ sub update {
 sub _iterate_commits {
   my ($self, $fcn) = @_;
   my $type = $self->opt('type');
-  say "Scanning for $type commits since " . $self->last_tag . "...";
+  say STDERR "Scanning for $type commits since " . $self->last_tag . "...";
   for my $log ( $self->find_commits($type) ) {
     redo unless $fcn->($log);
   }