I was using the titlesec command
\titlelabel{\thetitle.\quad}
to add a period after the section number, but it isn't compatible with the memoir options :
\section[Section title in TOC][Heading section title]{Section title}
(problem already noted here About memoir and titlesec incompatibility)
My question is : how can I add this period after section number with memoir class (so, without titlesec) ?
MWE :
\documentclass[a4paper,11pt,twoside]{memoir}
\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}
\usepackage{lmodern}
\usepackage[english,french]{babel}
\begin{document}
\tableofcontents*
\chapter[Chapter title in TOC][Heading chapter title]{Chapter title}
\section[Section title in TOC][Heading section title]{Section title}
\end{document}