--- a/tools/manip/inputgen.orig.py	2020-05-30 03:47:30.000000000 +0200
+++ b/tools/manip/inputgen.py	2021-12-26 12:13:08.819979543 +0100
@@ -266,7 +266,7 @@
                        file (string)
     """
     nproc = 0
-    file = open(filename, 'rU')
+    file = open(filename)
     text = ""
     while 1:
         line = file.readline()