Fix erroneous removal of _simple_chars

Author: giohappy

create-envfile.py

@@ -42,6 +42,7 @@ def shuffle(chars):
     random.shuffle(chars_as_list)
     return "".join(chars_as_list)
 
+_simple_chars = shuffle(string.ascii_letters + string.digits)
 _strong_chars = shuffle(string.ascii_letters + string.digits + "#%*._~")
 
 def generate_env_file(args):