Add precision to args=-1 usage

DelazJ · nyalldawson · commit 2d1dbe7f7417 · 2018-09-10T15:25:42.000+10:00
diff --git a/python/user.py b/python/user.py
@@ -85,7 +85,7 @@ def load_user_expressions(path):
 
 :param args: Defines the number of arguments. With ``args='auto'`` the number of
              arguments will automatically be extracted from the signature.
-             With ``args=-1``, you can pass any number of arguments.
+             With ``args=-1``, any number of arguments are accepted.
 :param group: The name of the group under which this expression function will
               be listed.
 :param handlesnull: Set this to True if your function has custom handling for NULL values.
