Better cat-file tree format

libwyag.py

@@ -286,6 +286,10 @@ def cmd_cat_file(args):
 
 def cat_file(repo, obj, fmt=None):
     obj = object_read(repo, object_find(repo, obj, fmt=fmt))
+    if fmt == b'tree':
+        for item in obj.items:
+            print(f"{item.mode.decode('ascii')} {item.path} {item.sha}")
+    else:
         sys.stdout.buffer.write(obj.serialize())
 
 def object_find(repo, name, fmt=None, follow=True):