\makeatletter \@ifclasslater{oblivoir}{2021/05/20}{}% {% \def\obparttitlealignment{} \long\def\@part[#1]#2{% \M@gettitle{#1}% \def\f@rtoc{#1}% \@nameuse{part@f@rtoc@before@write@hook}% \phantomsection \mempreaddparttotochook \ifnum \c@secnumdepth >-2\relax \refstepcounter{part}% \addcontentsline{toc}{part}% {\protect\partnumberline{\hparttitlehead}\f@rtoc}% \mempartinfo{\thepart}{\f@rtoc}{#2}% \else \addcontentsline{toc}{part}{\f@rtoc}% \mempartinfo{}{\f@rtoc}{#2}% \fi \mempostaddparttotochook \partmark{#1}% {% \obparttitlealignment \interlinepenalty \@M \parskip\z@ \normalfont \ifnum \c@secnumdepth >-2\relax \prepartnum \partnamenum \printpartnum \partnamenum \postpartnum \midpartskip \fi \printparttitle{#2}\par}% \@endpart} } \makeatother