+++ /dev/null
-diff -up tree-1.6.0/tree.c.args tree-1.6.0/tree.c
---- tree-1.6.0/tree.c.args 2013-04-11 11:53:47.676572649 +0100
-+++ tree-1.6.0/tree.c 2013-04-11 11:56:10.962350448 +0100
-@@ -536,6 +536,8 @@ void usage(int n)
- " --filelimit # Do not descend dirs with more than # files in them.\n"
- " --timefmt <f> Print and format time according to the format <f>.\n"
- " -o filename Output to file instead of stdout.\n"
-+ " --du Print directory sizes.\n"
-+ " --prune Prune empty directories from the output.\n"
- " -------- File options ---------\n"
- " -q Print non-printable characters as '?'.\n"
- " -N Print non-printable characters as is.\n"