73.3 syntax

<..syntax.4ht..>
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 % syntax.4ht                            2014-07-12-22:36 %
 % Copyright (C) 2004--2009       Eitan M. Gurari         %
 <.TeX4ht copyright.>
 <.config syntax.>
 \Hinput{syntax}
 \endinput
 -_-_-

<..config syntax..>
 \let\o:sb:=_
 \def\:temp{\ifmmode \expandafter \pr:sb \else \expandafter \sys:sb \fi }
 \HLet\sb\:temp
 \AtBeginDocument{\catcode‘\_\active}
 -_-_-