War on whitespace

This uses "git-apply --whitespace=strip" to fix whitespace errors that have
crept in to our source files over time.  There are a few files that need
to have trailing whitespaces (most notably, test vectors).  The results
still passes the test, and build result in Documentation/ area is unchanged.

Signed-off-by: Junio C Hamano <gitster@pobox.com>

builtin-pack-objects.c

@@ -252,7 +252,7 @@ static void *delta_against(void *buf, unsigned long size, struct object_entry *e
         delta_buf = diff_delta(otherbuf, othersize,
 			       buf, size, &delta_size, 0);
         if (!delta_buf || delta_size != entry->delta_size)
-        	die("delta size changed");
+		die("delta size changed");
         free(buf);
         free(otherbuf);
 	return delta_buf;