%#!luatex
\input luatexja-core.sty
-\def\head#1{\medskip\noindent{\bf\tengt ■ #1}\par}
+\def\head#1{\medskip\penalty-100\noindent{\bf\tengt ■ #1}\par\penalty10000}
\jfont\rml={psft:Ryumin-Light:jfm=ujis} at 10pt
\rml あ\inhibitglue\char"201Cあ・い←Ryumin-Light
\vfill\eject
\kanjiskip=\maxdimen
-\setbox0=\hbox{\rmlh ンン}\dumplist0
+\message{SSS}
+\setbox0=\hbox{\rmlh \ltjsetparameter{autospacing=true}ンン\ltjsetparameter{autospacing=false}ンン}\message{SSS}
+\dumplist0
\end