<?

[hb--]

From the docs: "MMK recognizes two special modifiers on action lines specified for inference
rules. The setup modifier, '<', forces the execution of an action prior to any unmodified action. ..."

But what does it mean in a usual action line, as at line 108 in sqlite3/blob/master/descrip.mms? Typo? Obviously it is kind of ignored in this context:

$ mmk/id
%MMK-I-IDENT, this is the MMK Make Utility V5.1
-MMK-I-COPYRIGHT, Copyright (c) 2008, Matthew Madison.
    Copyright (c) 2014, Endless Software Solutions.
  See LICENSE.TXT in distribution kit for license information.
$ $ mmk /descrip=sys$input
all :
 < write sys$output "hehe
^Z
write sys$output "hehe
hehe
$