cubicweb #2991997 documentation build fails [validation pending]

docstring of cubicweb.server.session.Session:6: (SEVERE/4) Unexpected section title.

prioritynormal
typebug
done in3.17.3
load0.100
load left0.000
closed by#1890e0df68fa [book] fix sphinx documentation generation (closes #2991997)
patch[book] fix sphinx documentation generation (closes #2991997) [applied]