+% chktex-file 15
+% chktex-file 9
+% chktex-file 17
\usepackage{geometry}
\geometry{
inner=25mm,
\let\titlesec@part\part%
\renewcommand{\part}{\@ifstar\part@star\part@nostar}
\def\part@star#1{\NR@gettitle{#1}\titlesec@part*{#1}}
-\def\part@nostar{\@ifnextchar[\part@nostar@opt\part@nostar@nopt} % chktex 9
+\def\part@nostar{\@ifnextchar[\part@nostar@opt\part@nostar@nopt}
\def\part@nostar@nopt#1{\NR@gettitle{#1}\titlesec@part{#1}}
\def\part@nostar@opt[#1]#2{\NR@gettitle{#1}\titlesec@part[#1]{#2}}
\makeatother