more compact progress display

Each progress can be on a single line instead of two.

[sp: Changed "Checking files out" to "Checking out files" at
     Johannes Sixt's suggestion as it better explains the
	 action that is taking place]

Signed-off-by: Nicolas Pitre <nico@cam.org>
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>

unpack-trees.c

@@ -307,8 +307,8 @@ static void check_updates(struct cache_entry **src, int nr,
 				total++;
 		}
 
-		start_progress_delay(&progress, "Checking %u files out...",
-				     "", total, 50, 2);
+		start_progress_delay(&progress, "Checking out files",
+				     total, 50, 2);
 		cnt = 0;
 	}